|Note_en={{Dating|seller}} Advertising for an eydropper ''[[overfeed]]'' model named ''[[Swan Safety Pen|Swan Safety Pen 2C]]'', with a screw cap, called ''safety'' for this reason. | |Note_en={{Dating|seller}} Advertising for an eydropper ''[[overfeed]]'' model named ''[[Swan Safety Pen|Swan Safety Pen 2C]]'', with a screw cap, called ''safety'' for this reason. |