Czech Republic [prior WW II]
Dearman

Copper bell with silver trim, brass valves and silver tubes
ca. 1939
Length: 18.5 inches
Wind Instruments – Brasswinds – Trumpets

Engraved on bell:  DEARMAN / WORNELL / MODEL / FOREIGN / PAT. No. 473818;  Engraved on valve #2: BRIT. PAT No 473818. Serial Number DW1021

Dearman is the trade name used on jazz band horns made in the Czech Republic pre-WW II.  Wornell was a brass instrument inventor who held the patent on the unique valves used on this trumpet.