"United States Mail Lock"
Variations

Click to Enlarge Image "UNITED STATES MAIL LOCK" - Stars. 2 7/8" high x 2 1/16" wide x 7/16" deep. Steel case. Steel shackle. Brass pins. Lever. Hollow barrel key. "UNITED STATES MAIL LOCK PAT'D JAN 20.1891" is stamped on the obverse of the case. There are 2 stars stamped on the obverse of the case at 11 o'clock. "US" is stamped on the obverse of the key. Frank W. Mix Patent # 445121. 677
Click to Enlarge Image "UNITED STATES MAIL LOCK" - No Stars - "U.S. MAIL" - "1877". 2 7/8" high x 2 1/16" wide x 7/16" deep. Steel case. Steel shackle. Brass pins. Lever. Hollow barrel key. "UNITED STATES MAIL LOCK PAT'D JAN 20.1891" is stamped on the obverse of the case. "U.S. MAIL" is stamped on the obverse of the shackle. "MADE IN U.S.A. 1877" is stamped on the reverse of the shackle. There are no stars stamped on the obverse of the case at 11 o'clock. "US" is stamped on the obverse of the key. Frank W. Mix Patent # 445121. 1007
Click to Enlarge Image "UNITED STATES MAIL LOCK" - No Stars - "1900". 2 7/8" high x 2 1/16" wide x 7/16" deep. Steel case. Steel shackle. Brass pins. Lever. Hollow barrel key. "UNITED STATES MAIL LOCK PAT'D JAN 20.1891" is stamped on the obverse of the case. "1900" is stamped on the obverse of the shackle. There are no stars stamped on the obverse of the case at 11 o'clock. Frank W. Mix Patent # 445121. 110