Re: Seeking possible origin of unmarked vintage bowlback
Whoa! That's an impressive piece! As a far-from-expert, I'll guess that it's not -or was not intended to be- a mandolin at all. Some form of lute, maybe? The non-raised fretboard, with the higher frets inlaid directly into the top/soundboard, is a design that pre-dates most mandolins, at least as I know them.
The tuning gears are a design that seems to have been mostly European from (guessing) maybe the 1880s thru 1930s. Specifically, the gears are riveted onto each post, plus the shape of the gears: a knife-edge worm engaging with almost square cogs. Compare that to almost any current tuner set (close-ups on Stewmac.com) and the difference is obvious.
I guess someone could have built a more modern instrument intended to emulate an older lute. A highly pertinent question would be: What is the scale length, being the vibrating string distance between bridge and nut? (True mandolins tend to be 13"-14", with 13 7/8" about standard. Mandolas would be 2-3 inches longer.)
But I could be way off base on any of this... I'm sure that the true experts will let us know!
- Ed
"Then one day we weren't as young as before
Our mistakes weren't quite so easy to undo
But by all those roads, my friend, we've travelled down
I'm a better man for just the knowin' of you."
- Ian Tyson
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