I do believe this is a nice RPM right here. It does not seem like any sort of strike doubling as there is clearly another D under there. Opinions please and much appredciated!
Thanks! Just did a quick minute of research and found this. 1955-D 1¢ WRPM-002 Description: D/D South Cross References: CONECA: RPM #2, Coppercoins: 1955D-1MM-002 Top 100 RPM: Wexler & CONECA