I became interested in these after acquiring a handful of the 18s keywinders.
They're very hard to find as cased watches, but I did manage to grab a couple bare movements on Ebay. The TM Avery is named for Elgin's second President.
Next, you feed it through till it reaches the witness mark, then insert the pin from the coil side. Unlike most full plate watches, the barrel is not removable once the plates are together. So, we have to put the whole train in before installing the upper plate. The smaller barrel bridge screw just threads into the upper plate.
The Illinois Watch Company was purchased by Hamilton Watch Company in 1927, but continued to produce Illinois watches under Hamilton management until 1932 (the year the last "true" Illinois watch was made).
By 1885 the company name was changed yet again to the Illinois Watch Company.
The company began operation two years later in 1866 in Elgin, Illinois,...
During Elgin's first decade, in addition to 18s keywound watches like the BW Raymond and others (see Luis Casilla's excellent presentation), Elgin also made 10s women's keywound watches, and for a while, 17s keywinders.
Illinois also produced watches for the Plymouth Watch Company (Sears Roebuck) and the Washington Watch Company (Montgomery Ward).
NOTE: The Illinois Watch Company should not be confused with the Illinois Watch Case Company of Elgin, Illinois.The hands go on like all hands, with the following caveat - you need to determine where the minute hand is, relative to the corners of the key square on top of the cannon pinion. Unfortunately, I had set the hour hand off just a little.If this were to be a working watch, I'd correct it. John Williams was president of the First National bank of Springfield. In 1879, due to financial difficulties, the company was reorganized and the name changed to the Illinois Springfield Watch Company. John Stuart was a Springfield lawyer and former partner of Abraham Lincoln. Illinois later produced an extensive line of extremely fine and accurate Railroad-grade pocket watches like the "Sangamo Special," "Bunn Special" and "Santa Fe Special" (just to name a few).These seem to date to 1875-1878 (see slide 92 of Casilla's presentation) 17s is an odd size.