https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=10416&pn=268,560 Combination Tool Patentees: Eli Smith - Springfield MA , James Duckworth - Springfield MA Granted:1882-12-05

Bevel that has stops on the body of the bevel at 45 (hinged and moveable) and 90 degrees (fixed).One sample appeared in a Martin J. Donnelly Auction catalog, as well as the the Brown Tool Auction catalog, samples marked with Patent date only no MFG.'s information.
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