Parker 21. 1960's. in black, 1/10 12k Gold filled cap (very rare)
Nib: Fine
The Parker 21 was a school-pen that followed the design of the Parker 51, but made in cheaper plastic and with an alloy 8-metal nib.
Cap : Made in Can. / Filler unit Made Toronto Ont. Can. imprint "use Superchrome ink"