Old Bundy flute with serial which year?

[Zekariah86]

Can anyone tell me which year my Bundy Selmer was made? It's serial number is 75629. It says "Made by Selmer, Elkhart Indiana" Above that is the Bundy with Reg. US. Pat. Off. Not necessarily thinking it's worth anything, but I am very curious. Any help would be appreciated, if only suggestions on how I can go about finding out.

[JButky]

Early 1920's Bundy serials are listed as 61255 (1920)- 175275 (1925) from what I can tell from the lists I have.