Some wrenchs I got at auction Sat. No questions on the 18 in Coes or the Parke Metalware Bycycle wrenchs, but the Buggy wrench has me stumped as to maker. Mark is D in a diamond. D could be an O.
Other side is marked 1 1/4 and 2315E.
I have some Eberhard buggy wrenchs but don't recognize this maker. Would appreciate your knowledge of this maker.