S# 3,302 - The style of movement collectors have referred to as "Series III" probably was introduced at S# 3,301. S# 3,302, finished in early 1862, is the earliest known, surviving example of a Model 1862-N ("Series III"). It has the top plate design, eventually granted a design patent in 1866, with a thickened, protruding section carrying Reed's barrel and the stopwork. This early example has case screws on the dial plate, like the late, Model 1858 divided plate movements that immediately preceded it, and it also retains the late Model 1858 style of pallet bridge. It also features a Lange-style, hanging pin lever escapement, in which a single pin hangs down from the underside of one pallet arm and banks against the edges of a circular depression in the pillar plate. This borrowed idea was Howard's earliest experiment aimed at eliminating adjustable banking pins. The factory records indicate that this movement is fully adjusted to temperature, isochronism and positions, even though the factory did not begin engraving this type of information on watch plates until a few years later, after S# 12,000.
