Originally Posted by
Scooper
Good question.
The 1971 Paramount catalog lists the following fork rakes:
P13-9: 2 inches (50.8mm)
P15-9: 2 inches (50.8mm)
P14-0: 1-5/8 inches (41.3mm)
Unfortunately, I haven't been able to obtain a copy of the 1972 Paramount catalog evern though I've been actively looking for about five years. However, the 1973 Paramount catalog includes a specifications supplement page that states there were no significant "equipment" changes from the 1972 specifications for the P13-9, P15-9, and P14-0. It introduces the P10-9 as having "...the same basic specifications as P15 Paramout with the exception that gearing will be ten-speed. Gear range with standard equipment will be 51 to 100.
As a general point, I've seen some "transitional" P-13's from circa 1971 with some of the newer features and some of the older ones - I'm sure you have, too.