|Note_en=Published also on: year LVI, N. 44 (1929-11-03). Advertising for the [[Duofold]] model for beeing capable to write whitout pressure (a reference to the ''[[Pressureless Touch]]'' of the contemporary American advertising), for beeing unbreakable and lighter because of ''[[Permanite]]'', the button filler and the 25 year warranty on the nib; lists the colors. | |Note_en=Published also on: year LVI, N. 44 (1929-11-03). Advertising for the [[Duofold]] model for beeing capable to write whitout pressure (a reference to the ''[[Pressureless Touch]]'' of the contemporary American advertising), for beeing unbreakable and lighter because of ''[[Permanite]]'', the button filler and the 25 year warranty on the nib; lists the colors. |