16S, 18K gold case, 19J. Circa 1887. Rare frosted movement. Came from a mixed run of only 500 & most were 13J but due to the 15 minute register (creeper) this needed additional jewels and is part of the reason for the 6 additional jewels. A Riverside model according to factory records, but not indicated as such on the movement. This movement with the 15-minute track on the dial is very rare.