The title is a bit misleading. The first serious watch I bought was a 20 size Waltham from the 50,000 serial number run. Those watches were made in Nashua and almost all were finished in Waltham. When those watches were no longer in process, Waltham changed the jeweling to the American style with center jeweling instead of cap jewels on the pallet and escape wheel. I remember how exciting I found all that oddness when I first met these pieces. I recently bought an inexpensive going barrel Rotherhams watch signed on the movement for a jeweler on Jersey. It is about a 14 size or perhaps a little smaller. It provides an interesting insight into what the watchmakers at Nashua were trying to accomplish. They wanted a very respectable watch and did not think the Waltham 1857 model could be made to fit the bill.