A very similar 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).
Close-up view of the bell of an F. E. Olds Military trumpet with a hammered finish. This line was introduced in about 1933. Engraving visible near the end includes the wing of an American bald eagle above "Olds" and "Military Model."
Advertisement photograph of a row of six tubes of Olds brand lubricant for trumpet valves and trombone slides against a sign reading "Olds Lubricant 35¢." Four drops of lubricant fall from a seventh suspended tube.
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).
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).
Close-up view of a lathe being used in the production of brass horns (cornets, trumpets and trombones) at the F. E. Olds and Son plant. A technician's hand operating a wheel is visible in the lower left corner of the image.