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.
Thanks!!! I never would have guessed a soprano recorder. I think it’s a perfect match.
I saw that on eBay recently and very nearly placed a bid on it. I had no idea what it actually was, but it looked really interesting. Please do let us know how it plays etc.
I bought this at a thrift shop, not eBay. Guess I’ll look at eBay more often!
Actually, now that I think of it, it wasn’t eBay, it was the shopgoodwill.com website. I don’t remember which of their local Goodwill stores was selling it, and its no longer in my favorites list, so the ad has gone. But it was recent … within the last 2 months.
Good job Cyberknight identifying it so quickly. I tried quite hard to figure out what it was, but didn’t find anything.
Is that a high D whistle and the seventh hole gives the option of a lower C? Also, the blade looks quite narrow and I’m wondering if the whistle is therefore quiet. How is the transition between octaves?
You got me! The thrift shop was Shopgoodwill.com.
Wish I could answer your question about the holes and octaves, but I’m not a recorder expert.
Let us know if you decide to sell it! 
This is probably a daft question, but can you play it without the wooden mouthpiece with the jubilee clip? Or does that whistle-like head form the underside of the windway, meaning that you can’t?
It’s a strange construction, I’m wondering why the mouthpiece is separate at all if you can’t use the whistle head as an alternative.
The mouthpiece is separate because it’s designed to be adjustable. You can change the voicing of the instrument by adjusting the window size.
I doubt it, most accounts say it’s quite loud.
I could be wrong about this (someone please correct me if I am), but I think recorders can get away with smaller blades (while still having good volume), because they’re voiced in such a way as to bring out the lower register as powerfully as possible. On a whistle, such voicing would make it difficult/impossible to play the upper register, but that isn’t an issue on recorder due to its thumbhole.
