April of 1962 was the first month the necks were stamped with a code designating model, month and year of production as well as nut width. In the course of July 1962, the slab rosewood fretboard was replaced with a carved type known as a "veneer" board.In 1962, Fender began having the potentiometers for their guitars consistently stamped with part numbers during this time.
It is understandable why a factory with a growing amplifier and guitar line would implement this procedure.
In the fall the clay dots were replaced with pearloid material.
Briefly the Jaguar had a 6 patent number decal running in two lines.
There only appears to have been one batch of these used and the decal quickly changed to a 5 patent number configuration ( A= The part number for the neck.
The pickups were designed narrow and with a metal saw tooth like claw that was made with the intention of concentrating the magnetic field, providing a punchier sound than the Jazzmaster. Originally, the two shorter blades were meant to go under the plain B and E strings.
Leo changed the scale length, some of the body design.White pickguards of celluloid aged to a mint green color now were stark white.Fender upgraded its paint facilities to allow each guitar a permanent handle through out its finishing process.These tuners have a square pearloid button and a hand engraved F on the rear cap of the housing.These necks usually have a veneer on the rear hiding the doweled F tuner pilot holes.The first Jaguars were made in January of 1962 on a pre-production basis.