Hello Ive got two Weymanns and info on them is hard to come by. They were made in Philly and are very nice sounding. The model 15 was there entry level and the model 90 was top of the line and really decked out with inlays and purfling etc. I know a fellow who is collecting serial #'s etc, and building a data-base on the weymann company and there instruments. I can forward any and all info to him. My email address can be found by going to Mandolin Cafe and going to registered guest mandolooter. Thanks Jeff