Sometimes the letters have to be read together. For example 69EB EB indicates Ebonite.
The model 71JB has to be seen in context of its evolution.
71J is the Plain marbled one with wide cap band. Bars type ink view window
71JT is marbled cap with transparent acrylic barrel.
71JB is non marbled. Solid color cap barrel. Special cap and barrel finials. And etched design cap band. Initially it was released only in black. Perhaps the B alludes to that.
S is small. Eg 69TS
G is GOLD. Eg. 69LGM.
D indicates design on cap. Eg 77PD.
R indicates regular (ED). Used on models available as piston as well. Eg 77RD.
Edited by hari317, 26 May 2020 - 09:54.