Wow. I really thought that between the suspension details and the same design (and location) for the lamp that it was going to be some variant made by Stanley. Either those guys were working together or there was a lot of copying going on between different manufacturers back then. That’s a lot of details to be almost identical when there was such a variety in styles back then.
Very interesting, and some good detective work in tracking it down.
I don’t think you were far off - many cars used bodies, fenders, lamps and even power plants from other manufacturers. Add to that the fact that the original Stanley Steamer designs were sold to what became Mobile and Locomobile (early ads for each company actually used the same photo of the Stanley brothers in a Stanley runabout).
In those early days, there was not a lot of custom coachbuilding going on, but an Amesbury, MA carriage maker; Currier, Cameron & Co.; manufactured bodies for all three companies.
It appears that the Stanley brothers came out with a new, improved steam design in 1902, leading to many lawsuits. By 1903, Locomobile had switched to gasoline engines and Mobile ceased production.