|Note_en=Related to publication of the same text, year cited on an advertisement on the back. Advertising for the [[Duofold]] model in its different versions: ''Lady Duofold'', ''Duofold Junior'' and ''Over-size Duofold'' and their mechanical pencils. | |Note_en=Related to publication of the same text, year cited on an advertisement on the back. Advertising for the [[Duofold]] model in its different versions: ''Lady Duofold'', ''Duofold Junior'' and ''Over-size Duofold'' and their mechanical pencils. |