A  left hand exterior mortise lock that measures 2-1/2" x 5-1/2" high with the edge plate being 1" x 8 inches long. From the center of the door knob hole to center of the cylinder hole is 3-3/8 inches. This lock will also except thumb turn which is 2-1/4 inches up from the door knob hole. This lock was made in Reading, PA and today sells for over $350.

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