GRM,
Sure is hard to find anything about M.Suzuki guitars, why don't u post some pics of yr work mates one? My pics on Photobucket, link on my previous post, above.
Took my guitar to a local reputable guitar shop for a quick valuation.   Took one look at the headstock logo, said it's just a Suzuki, worth couple of hundred.   Now the valuation is fine by me, but I disagree about the identity assessment.   I've got a couple of Kiso Suzukis and they are nothing like the quality of the M.Suzuki.   It's a tank, soundboard is as flat as the day it left the factory and it's had string tension all that time. Came out of Suzuki Musical Inst Mfg Co, Hamamatsu.    The Kiso Suzi's both have partially collapsed sound boards.   They came out of Kiso Suzuki Violin Co Ltd. It's hard work trying to sort thru all of this stuff, plenty have already tried.