Parker Vintage Parker 21 Mark I Fountain Pen - Red - Tested Cleaned Polished

Up for sale is a vintage Parker 21 Mark I aerometric fountain pen in classic Red with a brushed stainless steel Lustraloy cap. FEATURES & DETAILS: - Model: Parker 21 (Early Mark I version with plain ridge clip) - Color: Red resin barrel and section - Cap: Brushed Lustraloy cap with chrome trim and PARKER cap band imprint - Nib: Hooded fine/medium alloy nib - Filling System: Internal press-bar aerometric filler with clear pli-glass sac CONDITION: Fully cleaned, flushed, tested, and hand-polished. The aerometric filler sac is intact and functional. The clip exhibits visible plating wear / brassing as shown in photos. Light micro-scratching on cap and barrel consistent with vintage age. No cracks or deep gouges.