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    With this article,  I want to feature my good old acoustic guitar: a Gibson MK-81 from 1976.

    I got this guitar more than 20 years ago. I was looking for an acoustic guitar and was trying out all the guitars in that shop. After a while the shop owner brought one more from some room in the back,  saying I should try out this one, it was special. This was the Gibson MK-81, and in fact it sounded different from all the other guitars, it sounded more ‘expensive’ in a way, with a warm bass and brilliant treble, like a great HIFI speaker compared with a cheap one. He told me that this guitar had been damaged damage and was not professionally repaired (the bridge had solved from the top and had been glued back to its position, additionally fixed with two screws), and that it normally costs more than 3 times the money I wanted to spend.
    Well, we agreed on a deal (I had to part from a nice Tokai Telecaster copy I had back then) and I took this guitar home with me. The damage could be repaired professionally for about 100,- € by the way.

    The MK series

    I had never heard about these guitars before, and there was not much information available. Remember, this was before the Internet, so you had to look through guitar books at the shop when searching for a particular information. Today it is so much easier. The story behind the Mark series seems to be like this:

    In May of `73 Gibson began the Mark story by contacting Dr. Adrian Houtsma, Professor of Acoustic Physics at MIT, to confirm some research Gibson itself had initiated. Receiving a favorable review, Gibson then went to Dr. Kasha, who was at the time, a chemical physicist working as Director of the Institute of Molecular Biophysics at Florida State University. Combining the findings from Gibson` R&D department and Drs. Houtsma and Kasha, the company finally landed on the doorstep of well known luthier Richard Schneider, who was charged with making the scientific information practical, designing a guitar that fit with Gibson`s aesthetics and capable of being put into production. The Mark series was born…

    The Mark series was no commercial success, rather the contrary as it seems. It turned out that science alone was not capable of building perfect guitars made of wood, a material that is unpredictable  because each piece of wood has individual features. After only 3 or 4 years Gibson dropped the Mark series again.

    But these guitars were not really bad, and I heard from many owners how much they love their MK’s. The complete series consisted of 5 models, the MK 35, the MK 53, the MK 72, the MK 81, and the MK 99 (the higher the model number, the better the materials, and the higher the price).

    Here is a page from a Gibson catalogue from that time that shows the different features of the different models:

    The MK-81

    Both the rim and back of my MK-81 are made of solid (!) rosewood (possibly Brazilian, but not sure), the top is solid spruce. The neck is curly maple, the fingerboard is ebony with mother-of-pearl inlays. There are some fancy details that make sure that this was the top-model of the production range (in fact, the MK-99 seems to be custom-made by luthier Richard Schneider himself only) like  the gold plated hardware or the black and red bindings.

    It is a special guitar in fact. It is very deep, and the body and headstock shape looks somewhat unusual. The sound is warm and bright, a bit bell-like. With the heavy Gibson jumbo frets and the “fast” neck shape it plays almost like an electric.

    Pictures of my MK 81

    The soundhole ring looks like wood but is plastic

    Note the red bindings

    Ebony fingerboard with mother-of-pearl block inlays

    The sides and the back are solid rosewood (probably Brazilian)

    Youtube videos

    Two of my latest youtube videos feature this guitar.

    If you want the full story and more details of the Mark series, see this article in vintage guitar magazine.

    "Buy me a beer" - donate for the site via PayPal. Or buy a backing track in my online shop :)

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    14 Comments »

    1. [...] guitar is a weird Gibson from 1976, a MK-81. The MK series was Gibson’s attempt to combine the latest physical research results with [...]

      Pingback by Acoustic guitar cover of Boom like that and Song for Sonny Liston | Mark Knopfler Guitar / More Knowledge about the guitar — 20. January 2010 @ 17:29

    2. This guitar looks fantastic, I’d be happhy to try it at least for several minutes, the sound must be very cool! You just don’t imagine how much I like old guitars…

      Comment by ProFuzz — 28. January 2010 @ 17:11

    3. I own a MK-35 I bought new in 1977 & love it. In fact when my time comes, it will be inherited by my youngest son, who knows the value of this fine instrument & learned to play on the same. I’ve been playing since 1962 & am 54 yrs young as of this writing(10March2010). It’s just a shame the way the purists run down guitars that don’t have their “Seal of Approval”. Oh well-it’s their loss. All I can say is-”Enjoy”! (notice my e-mail address?)

      Comment by Gibson Guru — 11. March 2010 @ 04:14

    4. MK Series! These guitars are for life! I have one of the original MK-81 demonstrators, built by master luthier Ricardo (Richard) Schneider, who was involved in Norlin’s (Gibson) MK Series designs during the 1975-1977 period with Dr. Michael Kasha, (Univ. of Florida). I got mine from the Norlin’s Sales Rep for Tennessee at the time, who got it as a “back door” instrument straight from Schneider when the whole project went kaput and Norlin ordered all demonstrators picked up and destroyed!! The guitar is Sunburst, similar to the one shown at the bottom left of the catalog page, except everything was done by Schneider himself, the detailing and the woods are just incredible. Mine has been kept in its case since 1980, it has the original unused pickguard still in its factory envelope with instructions, and it came with a total of 4 bridge saddle-inserts, 2 in ebony/bone, 2 in Melamine, all in different heights. The sound is penetrating, cutting, silky, smooth, loud, too many qualities to put in words, and the beauty of the instrument is like no other Gibson or Martin or any other guitar I have ever seen since I started playing in 1963.
      One observation about your MK-81: the pearl dots on each end of the bridge are not original, mine does not have them, and neither do the catalog pictures. Those are reinforcements, apparently your bridge was being pulled off. congratulations, these guitars are simply, unique.

      Comment by Jose — 15. March 2010 @ 20:19

    5. here’s more info. on my MK-81:
      I first saw and heard a MK-81 guitar in mid 1978 in Los Angeles, Calif., when I was enrolled at GIT (Guitar Institute of Technology). Someone from Norlin/Gibson showed up at GIT with the guitar and was demonstrating it to Howard Roberts, Ronnie Eschete, Don Mock, and the other famous instructors there while we all listened and each instructor played the MK-81. (not sure but I think the guy from Norlin/Gibson was called Bruce Bolin). The guitar had a fantastic volume and richness of harmonics that none of us had ever heard from an acoustic guitar, even sitting in the back with 40 other students in front of me. Next day I went around the Hollywood guitar stores looking for a MK but incredibly, nobody had heard of the MK Series. I kept checking but all I heard from the guitar stores was about “The New RD Series”. (another Norlin fiasco). I graduated in 1979 from GIT and moved to Nashville Tennessee; I kept going around guitar stores in Nashville and it was the same story, but in one of those stores, one lady told me: “if anybody knows anything about those MK guitars, it would be “Mr. Jim” at so-and-so music store (names changed because “Jim” asked me to not reveal his name); So off I went looking for “Jim”. Turned out he was the Norlin Sales Rep for the South East. Jim kindly told me to call back in a month and he would have some MK’s for me to try out. When we met again, he had a MK-35, and MK-53, and a MK-72, all with the ‘flat’ finishes and the guitars were practically falling apart at the seams, and they sounded horribly “flat”. I told Jim that’s not what I saw at GIT and he smiled and told me “you probably saw one of Schneider’s demonstrators, (the MK-81 model), I have one of those but I’m not selling it, too many memories”. Well, I kept calling and harassing “Jim” to show me the guitar. A year later, I called him again and he invited me to his house to see the guitar. That was it! it was a gem of a guitar, hand-built by a Master Luthier, with a finish like glass. After a few more months, “Jim” agreed to sell me the guitar if I paid his price, and I did. Took me a few more months to pay him but I bought it and I still have it.

      Comment by Jose — 15. March 2010 @ 20:58

    6. Thanks for your interesting comments :)
      You are right, the pearl dots on the bridge of mine are not original. When I got it it was in a bad state: the bridge seemed had loosened and was then screwed to the top ! I had it repaired and the luthier covered the holes with the dots.

      I also love mine very much, it sounds so special and nice. Never understood why it the series flopped.

      Comment by Ingo — 15. March 2010 @ 21:51

    7. I was told by “Jim” the Rep that the Mark Series flopped because the production examples did not meet any quality standards, or those set by Richard Schneider who built the prototypes; Norlin wanted to do a quick job of assembly, (“we gots to move these, refrigeraters…”, but the Mark guitars could not be produced at speed and the result was a disaster. When Schneider saw the first batch of Mark guitars, he was disgusted and quit, Dr. Kasha quit next, and corporate chaos ensued.

      Comment by Jose — 21. March 2010 @ 17:46

    8. Hi, recently I’m too the very very happy owner of a mk-81.
      It just plays lovely and the sound is so nice.
      But i’ve got some troubles decoding the serial number. Mine says on the back of the head: “MK-81 made in u.s.a 00222255″.
      I can’t figure out for myself the year it is build etc.
      According to the seller the guitar is build in 1976 and I’m the 4th owner, the first owner was a Gibson employee and they sold it to a couple who owned the guitar until 9 years ago and recently it got it.

      Hopefully anyone of the other MK-81 owners now how to decode the serialnr.

      Comment by David — 22. June 2010 @ 18:40

    9. Some pics of my MK-81:
      http://picasaweb.google.co.uk/frdako/Mk81?feat=directlink

      Comment by David — 30. June 2010 @ 14:46

    10. I own a MK81. I think it is pretty simular in serial number. It is number 06183557

      Comment by Jim Phillips — 30. July 2010 @ 17:30

    11. Hi! I have this guitar, I love it and have had it many years, anyone know what the value is?

      Comment by john — 6. August 2010 @ 19:00

    12. I got my MK53 from a friend that owned a music store the guitar looks just like it did the day I bought it in 1978 it sounds great and I would not sell it for any price it will be passed on to my son I know he will take care of it as I have throught the years. the style is different from Gibson normal style but but I like it as much as my model J-45.

      Comment by Tommy — 6. October 2010 @ 15:28

    13. MK 72 ALL THE WAY. WOULDN’T SALE MINE FOR ANY PRICE!!!!!!!!!!!!!!!!

      Comment by BRIAN — 21. December 2010 @ 05:53

    14. The MK 72 & the 81 box are made from same material.Both sound great but usually vintage guitars sound sweet as wine, better with time!But the MARK series guitars are among the most talked about guitars on he planet.Sure some had issues, some didn’t.thats the way it is with everything.The MK was a challenging era in GIBSON’S history,thats what makes them so rare and collectable,iv’e had many many many guitars,none play or sound as well as my MK 72.And it’s also the only guitar that people can spend hours talking about it’s history.There will never be a more interesting gibson guitar than this one.There will come a time when the average person can not afford an MK.The prices are starting to rise so hold on will see just how far they will go,if you have one hang on to it you want be sorry. average now IS $1200 – $1800 mine is not for sale at any price! THANK YOU GIBSON! THANK YOU!

      Comment by BRIAN — 21. December 2010 @ 06:27

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