|Note_en={{Dating|seller}} Confirmed by finding the page on Google Books, corresponding to number 101, for Janauary-June 1926. Advertising for a [[Duofold]] model in the ''Duette'' combination with its mechanical pencil. | |Note_en={{Dating|seller}} Confirmed by finding the page on Google Books, corresponding to number 101, for Janauary-June 1926. Advertising for a [[Duofold]] model in the ''Duette'' combination with its mechanical pencil. |