Pink and Green Gold Solid 14k caps with icicle or "Empire" pattern with 14k Green Gold clips.  One of the most recognizable and desirable "51" caps.  Pattern was copied for the Limited Edition 2001 Parker "51".  All 14K capped "51s" were marketed by Parker as the "Heirloom".   Uncommon Caps

14k Solid Yellow Gold caps with 14k Yellow Gold clips in "fishscale" pattern.  Marked 14K on caps and clips.  All 14K capped "51s" were marketed by Parker as the "Heirloom".   Uncommon Caps

Pink and green solid 14k gold caps with Coronet pattern with 14k clips.  Pattern is of chevrons in pink gold over yellow gold.  This pattern carried over from the famous Parker Vacumatic Coronet series.  Very few pens and pencils have been found. Extremely Rare Caps

Parker "51" Vacumatic Series "First Year" Caps 1940-1941
	First Year Cap Lustroloy (stainless steel) caps with gold filled clips and gold filled bands.  Also known as a "wedding band cap".  Brushed finish on most caps, although some examples are found with a rhodium plating.  Most examples have aluminum jewels. Less Common Cap