12mm X 22mm - glass bevelled and cut to fit case shape
Movement has asterisk as well as what looks like a circle - so could be 24 or 25 vintage ??? or later ??
The 6N - 16 jewel movement is not in the database so this is a new one for movement DB.
Case is 16.5mm X 26.75mm. Lug end to lug end is 29mm White gold filled ?kt. Writing in case is very feint.
Band looks to be original with 32 faceted sapphires roll set. Do not know if these are real or simulated.
Edit: The closest picture that I can find in the DB is "The NORMA" 1924 image 11 of 36, but this has a 15 jewel movement.
Edit 2: 6N movement now added to the movement data base. These models are also close, but I do not think they are right - 6720??, 7805??, 6722??