Yes, GWM Fauber, perhaps pre-war teens.
Looks like another one sold by a member; (from Pandora Ohio?); B-serial number prefix, 45-mm threaded BB, and 1913 patent frame (1916?).
View attachment 1220775
Note that the holes are of different offsets from the crank shaft, maybe different diameters too(?); not likely that equally spaced diamonds were re-drilled or reamed out.
Looks like John's sprocket was used with a Miami crank (small pin, wider offset than most).
It would be interesting to i.d. each of those 5 holes: GWM; Miami; Excelsior(?); Emblem(?); and another?
View attachment 1220779
What years:
I forget in what other post the year that GWM Indiana started manufacturing and advertising Fauber (was Chicago) parts. Perhaps they started with furnished Fauber tools (dies), and "had to do something" to make the holes in the boiler-plate steel sprockets match their own foundry-forged cranks -- as well as other manufacturer's cranks.
I forget in what other post the year that Miami advertised that they made their own bottom bracket hangers, cranks and sprockets.
I generally refer to GWM-built Fauber cranks and sprockets as plain Fauber's (stamped or not), just because I only see the ToC ones in old ad/catalog pictures.