|Note_en=Scanning of a January 1954 [[Parker]] advertising for the [[51]] model. Published on ''Life''. Retouched by the author for a better sharpness. Dating provided by seller. | |Note_en=Scanning of a January 1954 [[Parker]] advertising for the [[51]] model. Published on ''Life''. Retouched by the author for a better sharpness. Dating provided by seller. |