Launched in 2000 to commemorate the new millennium, the Patek Philippe ref. 5100J forms part of a four-piece limited run with an 18kt yellow gold variant of 1500 pieces, which the ref. 5100J is, and three other metals, 18kt rose gold, white gold, and platinum, totalling another 1500 pieces. Powered by an entirely new chronometer movement, at the time, with an impressive 10-day power reserve, the manual-wind cal. 28-20 represented a first in watchmaking as this rectangular movement featured a power reserve indicator and subsidiary seconds dial along with being issued a unique rating certificate issued jointly by the C.O.S.C. and the Geneva Seal Institute. With its elaborately designed 18kt yellow gold case flaring out at its center and featuring a gentle curve that wraps around the wrist, the ref. 5100J is a splendidly comfortable timepiece, as it wears just as it is styled, with class and elegance. Inspired by the mid-century ref. 2554, the ref. 5100J is a heritage-inspired timepiece with a classic feel and aesthetic. Featuring a gently-textured silver dial with applied Arabic numerals and indices along with its dauphine hands, this timepiece is stunning, rare, and well worth some serious consideration by any seasoned Patek Philippe collector.

An exquisite example of Patek Philippe's craftsmanship, and spectacularly rare as a commemorative timepiece, the ref. 5100J has everything a collector could look for in a classically-inspired Patek, with its manual-wind movement, elaborate case and stunning dial.