Only six sleuths ventured guesses as to the purpose of Rae St. Amand’s square October mystery device, but all of them zeroed in on a single object it was once used for.
“It’s a butt gauge for laying out door hinges,” says Tom Altman. Well, Tom, other readers here will debate you about its usefulness as a hinge layout tool, but they’ll agree that this Granger item is made for doors.
“It looks like an antique rim lock, the predecessor to today’s deadbolt,” speculates David Underhill from Monument, Colorado. He adds, “I don’t know the size, etc., so it could be a latch for a cool box or similar.”
“It’s a door lock,” assures Robert Schweizer of Williamsburg, Virginia. “The round knob operates the bolt that is locked into position…