“D. K. MILLER LOCK CO PHILA. PA PATD JULY 26.70.” – No Pins – “L S & M. S. RY CO”. “D. K. MILLER LOCK CO PHILA. PA PATD JULY 26.70.” is stamped on the obverse of the body. “L S & M. S. RY CO” is stamped on the obverse of the shackle. “46622” is stamped on the reverse of the shackle. The reverse and the left edge of the case is plain.Patent # 105710.