I’ve enjoyed reading up on the details of this watch and company! The serial numbers put it right at the turn of 1906 to 1907. 120 years old, AND it’s still running. It is keeping decent time hanging up, struggles a bit when laying flat. Howard watches from the late 1800s and early 1900s were some of the best examples of watch making in the US and rivaled what the Swiss were doing at the time as well. He revolutionized pocket watches by coming up with the first stem wound versions. He also invented the adjustable regulation mechanism you can see in the upper left of the lower right inset pic.
This particular specimen was made just after that when the successor (Keystone) was making watches from the parts Howard had in stock after the sale of the company. The name eventually sold to Hamilton which is still a renowned American mechanical watch maker.
In these days, the watch movement and the case were two separate products. The case is made by the Chicago Crescent Watch Company. It is an open faced design housing the crystal, the back cover of the movement and an outer back cover. All these can easily be opened with a fingernail for viewing.
