Advertisement photograph of an F. E. Olds Military trumpet with a hammered finished bell. This line was introduced in about 1933. Engraving visible near the end includes the wing of an American bald eagle above "Olds" and "Military."
Technician applying engraved foliate decoration to the bell of a brass horn with a knife-like tool at the F. E. Olds and Son plant (probably a cornet, trumpet or trombone). Several engraving tools and a bowl of water (?) are on the work bench in front of him. He holds the horn with a piece of cloth and the bell of the horn rests on a piece of cloth. He wears a visor and a leather apron.
This photograph appears on page 24 of a catalog of the Chicago Musical Instrument Co. which is dated to 1933 or later (because it contains a reference to Radio City Music Hall which opened in December 1932).