@en|Scanning of a 1931 [[Parker]] advertising for the [[Duofold]] model, having Puccini as testimonial, featuring the ''Deluxe'' version in the ''Green & Pearl'' color. 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 1931 [[Parker]] advertising for the [[Duofold]] model, having Puccini as testimonial, featuring the ''Deluxe'' version in the ''Green & Pearl'' color. Published on ''The National Geographic''. Retouched by the author for a better sharpness. Date from copyright note of the advertising on the back. |