|Note_en=Second half of the year. Advertising for a series of ''[[Swan Pen]]'' models, with some eyedropper ''[[overfeed]]'' showing numbers [[Swan Pen 3012|3012]] at 10/6 and several other more expensive models with decorations, overlay, or large size. | |Note_en=Second half of the year. Advertising for a series of ''[[Swan Pen]]'' models, with some eyedropper ''[[overfeed]]'' showing numbers [[Swan Pen 3012|3012]] at 10/6 and several other more expensive models with decorations, overlay, or large size. |