Modifiche

|Note_en=Published also on: N. 42 (1930-10-19). Advertising for the [[Duofold]] model, showing a set in marbled celluloid, and the desk pen conversion.

|Note_en=Published also on: N. 42 (1930-10-19). Advertising for the [[Duofold]] model, showing a set in marbled celluloid, and the desk pen conversion.

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