The Yellow Cab Co. was founded in 1915, and I believe that this brass uniform coat button is from that general period of time. It measures 7/8" and has a rigid brass shank. It has raised lettering on the front reading "YELLOW CAB Co." on a finely lined background. It is backmarked, "SUPERIOR/QUALITY." In good condition, with light normal age wear. $15

This is a 2 piece flat gilt brass button from the Panama Pacific International Exposition held in San Francisco in 1915. It measures 5/8" and would have been a cuff button. Perhaps worn by a guard at the exhibition. It is backmarked, "*SUPERRICH/QUALITY*". It has a ridgid brass loop shank. I have 12 of these buttons. All in excellent condition! $12