Often a "working" Vac-filler which still has its old diaphragm will begin to show irregular flow, or will even release a sudden flood of ink as the age-rotten rubber fails. Posted 13 February - Mechanically, it seems to be closer to the 51 copycats of the s, such as the Waterman Taperite and the Eversharp Fifth Avenue, or to the later Parker Early 17s featured a small open nib, but the design was switched to a hooded nib in and most surviving examples feature the hooded nib. The date codes are somewhat mysterious, but follow a fairly simple pattern:. The Parker 75 Insignia is basically a gold-fill version of the Sterling Cisele but with a much lighter engraving.
It's a great pen, and I hope you enjoy it.
Where Are The Date Codes On A Parker 51?
Help, dating Parker 51 pen It will have been manufactured after the end of 51 Vacumatic production, earliest likely date being late. HTH, John. Never filled.