This flute was made by Theobald Boehm in Munich, Germany in 1848. It is a Boehm System flute, serial #4, made of silver with a wood lip plate and accessioned with a period case. This flute is engraved:Th.
Boehm flutes
The Flute Book: A Complete Guide for Students and Performers (Oxford Musical Instrument Series) eBook : Toff, Nancy: Books
History - FLUTE FACTS
History of Theobald Böhm and correct spelling
Theobald Boehm Flute National Museum of American History
Flute - Wikipedia
Ludwig Böhm - interview with the great-great-grandson of Theobald Böhm.
Rudall, Rose & Carte: the art of the flute in Britain - Document - Gale Academic OneFile
Theobald Boehm, German, Transverse Flute, German
Boehm system (clarinet) - Wikipedia
Theobald Boehm, German, Transverse Flute, German