Parker Duofold, 14K 585 Nib (info in comments) : r/PensandInk
Parker 585 14k M NIB Fountain Pen Made In France PP QI Silver Color | eBay
Parker 14k Gold Fountain Pen 585 Color Brown | eBay
Writing set, Parker, Made in USA, 2nd half of 20th c., converter fountain pen, 14 K (585) yellow gold nib and ballpoint pen, sterling silver 925/000 case, with check decoration and gilded