|Note_en=Scanning of a June 2, 1923 [[Parker]] advertising for the early hard rubber [[Duofold]] models with no cap bands. Published on ''The Saturday Evening post''. Retouched by the author for a better sharpness. Date on the back side. | |Note_en=Scanning of a June 2, 1923 [[Parker]] advertising for the early hard rubber [[Duofold]] models with no cap bands. Published on ''The Saturday Evening post''. Retouched by the author for a better sharpness. Date on the back side. |