Recently received from the eBay seller. It compares with the advice already stated from forum members -
Dear Buyer!
Sorry it took time to reply. This sax seems to be very rare, hard to find information about it.
We’ve consulted with a couple of sax experts / professors and were told that this instrument was most likely made by Yanagisawa.
It has the same logo (it looks like "sUs") found on Yanagisawa-branded saxophones.
We didn't found any other country info other than Japan neither on the sax itseld nor in it's passport; the only interesting thing we've noticed was
"Distributed by G. Leblanc Corporation in Wisconsin, U.S.A.". According to our info, G. Leblanc Co. distributes Yanagisawa in the North America.
At this point these instruments don’t seem to be produced under the brand name of Martin, but similar models might be found under different names since Yanagisawa was known to build instruments for other companies.
We were unable to find the instrument’s birthdate either. According to our professors, it seems to be a pro model of a previous generation:
It has a high "F" while the older student models didn't have it
It has metal-made rolls and valve tubes on the keys rather than plastic ones used on the "younger" saxophones.
The condition of this sax is excellent, it doesn’t look used. We can’t detect how many users it had, but it looks like it was not played at all, or maybe just a few times.
Please feel free to ask any questions.
best regards,
Paul K.