I have a aqua abm soda, from Crystal bottling Co, and the based is embossed with a large "C" that looks horseshoe-like, but the bottle is from Brockton Mass, so I doubt it's what you found in Ohio, but just keep in mind it could be a "C".
I have seen a black(slag) soda -I think I own it- with a good outlined horseshoe embossed on the base...3 or 4 nails each side and cleats; quite unlike a "C". ABM seam-
to-top (I'm gong to say, like Mission Dry...1925-35?)...