@en|Scanning of an August 21, 1926 [[Parker]] advertising for the new [[Duofold]], promoting unbreackable barrel in [[celluloid]] (named ''[[permanite]]''). First page (left). Published on ''The Saturday Evening post''. Retouched by the author for a better sharpness. | @en|Scanning of an August 21, 1926 [[Parker]] advertising for the new [[Duofold]], promoting unbreackable barrel in [[celluloid]] (named ''[[permanite]]''). First page (left). Published on ''The Saturday Evening post''. Retouched by the author for a better sharpness. |