The Model 4 was Seth Thomas's only known key-wind model, and it's very surprising that a key-wind watch would follow the stem-wound Model 1, but it was one of the four new models designed under Charles Higginbotham's tenure at the company. Only a few thousand were made and could be used in either open-face or hunting configuration, depending on the style of case.
The Model 4 was designated as Grade 11, and all were gilt with 7 jewels.
The only known option was a key guard, which appeared around the third SN block.
The earliest known publication for the Model 4 was 1888, which also followed the departure of the open-face Model 1. There were ads for it as late as 1896, but production of the Model 4 continued throughout the Old Eagle Series run and into the serial number range of the New Eagle line, which began at SN 700,000. A final run of a hundred was produced at SN 718,101, likely just to have a key-wind choice on hand for those customers who still preferred them. There is no known adverts of the Model 4 past 1900. Private labels have been reported.
Roughly 13,000 of the Model 4 were made in 23 separate runs, starting at SN 35,001 and ending at 718,200, giving it the widest range of the lower five models.
The watches logged in the M4 chart are all reported examples or verified from photos.
If your watch isn't on this SN chart please send us a picture.
Small quantities of Models 2, 3, and 6 have been reported with keyed arbors, and it's not known if those are transitional pieces that can still be stem-wound or if they are key-wind only.
If they are stem-wound they would contain the standard winding parts like the arbor, yoke, crown wheel and idlers, but although technically able to be wound with a key, any of these oddball examples would still be classed by model according to their serial numbers and found on the SN charts on those particular pages.