“D. K. MILLER LOCK CO. PHILA. PAT. JULY 26.70 OCT.21.73” – No Pins. “D. K. MILLER LOCK CO. PHILA. PAT. JULY 26.70 OCT.21.73” is stamped on the left edge of the body. The obverse and reverse of the case is plain.Patent #’s 105710 143831. (M-600).
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