@en|Scanning of an October 1929 [[Swan]] advertising for the [[Eternal]] model using the slogan ''Pen of the British Empire''. Published on the ''The National Geographic''. Retouched by the author for a better sharpness. Published also in December 1929. Both dating provided by seller. | @en|Scanning of an October 1929 [[Swan]] advertising for the [[Eternal]] model using the slogan ''Pen of the British Empire''. Published on the ''The National Geographic''. Retouched by the author for a better sharpness. Published also in December 1929. Both dating provided by seller. |