|Note_en={{Dating|archive}} Published also on: N. 48 (1929-12-01) and N. 50 (1929-12-15). Advertising for the [[Aurora_Duplex|Duplex]] model. | |Note_en={{Dating|archive}} Published also on: N. 48 (1929-12-01) and N. 50 (1929-12-15). Advertising for the [[Aurora_Duplex|Duplex]] model. |