My pictures were on an old server... I just took a couple of digital pics of my flute with the first couple of pages of the manual.

here

As to the mouthpiece and construction, they are stainless steel I'd bet. The mouthpiece 'may' have some lead in the solder, but I doubt it.

In case it's hard to read, the intro (by Fredrick Beckman, Supervisor of Music, Philadelphia Public Schools) says it was originated by Walter D. Lanahan.

The cover gives the location of The Melody Flute Company who published the book as Laurel, Maryland. So... because Laurel is about an hour from downtown Wash. D.C. where I bought my flute in about 1972, the old guy selling them may well have made it.

If there is enough interest, I 'can' scan the booklet... which is mostly 'how to' with some tunes.