Parker 51 Aerometric Mark IV - Navy Blue, Gold Filled Cap, Medium (Excellent, Works Well) - Peyton Street Pens
Parker 51 Mark I Cedar Blue & 16K Gold Filled cap with gold - Catawiki
Amazon.com : Parker 51 Deluxe Fountain Pen with Plum Barrel and Gold-Plated Attributes and Medium Nib in 18 Carat Gold with Black Ink Cartridge in Gift Box : Office Products
PARKER 51 Vacumatic 16K Gold-Filled Cap Fountain Pen and Propelling Pencil Pair, UK, Original Box - Price Estimate: $300 - $500
1950s Made in USA PARKER 51 Aerometric MKII-B 1/10 12K Gold Filled Cap & Black Body Hooded Nib Fountain Pen
1950s Made in USA PARKER 51 Aerometric MKII-B 1/10 12K Gold Filled Cap & Black Body Hooded Nib Fountain Pen