Desk pens are only black or brown. The nib units should work on either desk pens or pocket pens. Catalogs call them white dot cartridge desk pens for the long inlaid nib or cartridge desk pen for the dolphin nib in 1963. in '61 they are cartridge desk pen (arrowpoint) A11CD20X - black ABCD20X - brown or DeLuxe white dot cartridge desk pen (arrowpoint) A11CD21 - black ABCD21 - brown or "imperial" white dot desk pen - long inlaid nib which is a touchdown model A11SD17 - black ABSD17 - brown. Touchdown shown in 1967 ad.
Thank you. I'm not sure where my desk pen fits in: it's early, white dot, c/c, black, and has an inlaid nib. Here's the set in question:
Black glass base, black plastic trumpet with an angled top and gold (filled? plated?) band --
Circa 1960-63 --
White dot --
Long inlaid nib --
Squared base on the trumpet, echoing the PFMs and Imperials --
The clamshell case, with an inlaid-nib logo outside and in --
Unfortunately, there's nothing in the instruction sheet or elsewhere indicating a model or date. This has been a daily-use pen for the last 5 years or so -- I'm just wondering what I'm using!
(BTW, I don't think the section would work on a pocket pen. It lacks the clutch tabs to hold on a cap)