CIRCA 1902 to 1965. (CIRCA 1945). -INDEPENDENT SYSTEM CITY OF NY (IND) ROUND PIN BACK EMPLOYEE BADGE #5756. MARKED ON REAR “NC WALTER & SON NEW YORK”. (CIRCA 1930-1940). -SURFACE TRANSPORTATION SYSTEM NYC OPERATOR CAP BADGE #6567 W/SCREW “STS” LOGO IN CENTER.