You are bidding on a Starrett 4" lock joint caliper with a fine adjustment screw. It is in excellent condition with 3 hard to see lightly scribed initials. These 4" sizes are very hard to find, especially in this condition.
This is a used Marks Mortise Lock (LESS CYLINDER). The lock body is the model #91A. The trim is The New Yorker.(This trim requires through bolting) It is used so there are scratches and spots of paint on the trim and the lock body itself.
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