@en|Scanning of a May 1917 [[Parker]] advertising, illustrating the [[button filler]] merits and the new [[washer clip]]. Published on ''The National Geographic''. Retouched by the author for a better sharpness. Dating provided by seller. | @en|Scanning of a May 1917 [[Parker]] advertising, illustrating the [[button filler]] merits and the new [[washer clip]]. Published on ''The National Geographic''. Retouched by the author for a better sharpness. Dating provided by seller. |