@en|Scanning of a 1929 [[Parker]] advertising for the [[Duofold]] ''Deluxe'' model. Published on ''The National Geographic''. Retouched by the author for a better sharpness. Date from copyright note of the advertising on the back. | @en|Scanning of a 1929 [[Parker]] advertising for the [[Duofold]] ''Deluxe'' model. Published on ''The National Geographic''. Retouched by the author for a better sharpness. Date from copyright note of the advertising on the back. |