In addition to cranking out whistles in the shop, I've been keeping up with the sessions around here (see the new header photo and a YouTube vid here) and I've bought an old German "nach Meyer" flute. These flutes were sold between 1880 and maybe 1920 or so but all sorts of outlets such as Sears and Roebuck. A catalog from around 1900 has them listed for $4.95. But remember, they didn't even have gas stations then, so you can't stay the nice wooden flutes cost a little more than a gallon of gas.
If you want to follow the saga of the antique flute tweak, it's on the Chiff & Fipple Flute Forum. You do know about the Chiff & Fipple Whistle Forum don't you? If not check it out while you are there.
Most of the nach Meyer flutes you find these days don't play in tune with instruments tuned to the current concert pitch of A=440 Hz. So I'm going to see if I can "tweak" it into being in tune. It's a fun player, so it is worth the effort. And I'll no doubt learn something along the way. If you want to know more about the official Meyer flutes and/or the nach Meyers (the ones made "after the style of" the Meyer flutes) Google will lead to a ton of information.