Movements from the early 1880's marked Excelsior - Illinois Watch Co. early model 1857 Walthams from the late 1850's marked Excelsior, New York - various model Walthams from the mid-1870's to early 1880's marked Excelsior, Howard & Co., New York - Illinois Watch Co. The 'Excelsior' name in general was used on a diverse range of watches over a long period of time, including. I'm not sure the significance of the 'Excelsior Watch' marking on your watch, whether its a factory grade designation or whether a private label for someone. In your photos there appears to be a stray casescrew mark on the lip of the case to the left of the Tremont position, if this is correct the case has held another movement at some time.

I've heard a Tremont with the serial #1 exists, but the regular sequence of Tremont serial numbers begins with #1001 which makes yours a very low number. Congrats on the nice pick up for your collection, its definitely a Tremont and a nice scarce marking. I am a small time collector of old key winds watches only and i pick this about 4 month ago the name on the watch is EXCELSIOR WATCH,BOSTON,Serial number is (1046) the case is Fahys coin No1 with one star,balance wheel is steel,7 jewels,plain dial.just looking for some expert opinions about this watch,i have compare this watch to the one in the national museum of American history (on time)and movement looks identical to me.PS I did get permission from the seller to use the photographs that i am posting. Excelsior Pocket Watch Serial Numbers 3,9/5 3986 reviews

Excelsior pocket watch serial numbers