“D. K. MILLER LOCK CO PHILA. PA PATD JULY 26.70.” – No Pins – “NLNRR”. “D. K. MILLER LOCK CO PHILA. PA PATD JULY 26.70.” is stamped on the obverse of the body. “NLNRR” is stamped on the reverse of the shackle. The reverse and the left edge of the case is plain.Patent # 105710.