New here; hello everyone! I’m an instrument repairman who works on guitars and woodwinds. I’ve worked on some Sweethearts and Abells (beautiful).
I just picked up a real mystery. Looks to be a sterling silver tunable whistle with a wood mouthpiece, so it feels more like a recorder. The only marking is “Germany” on the mouthpiece. Ideas?
That’s a Foky-Gruber Silberton recorder, I believe! I saw one at a session once - really regret not asking the guy if I could try it out. 
I think most of them played with German-style recorder fingerings.
How does it play?
You should give it a toot and post a video on here. There are too few videos of this instrument playing on the internet.
