Nice surface mount interior door rim lock catch assembly. The assembly is unmarked, the manufacturer is unknown.  The door box and catch are in a worn original black finish with white paint along the sides.  The unit is free of any noticeable cracks or breaks. The latch assembly and top finger lock tab work as they should. We do not have the skeleton key.  Shows normal ware for its age, has scratches, and scuffs in the finish.  Overall good, salvaged condition. Please look over the pictures and ask questions when needed. Thanks for looking. 

Measures approx.- overall: 4" length x 4" tall x 3/4" thick x 1/4" doorknob hole

Catch: 3/4" wide x 3/4" thick x 4" tall