The smallest mortise I've ever listed, probably used for a cabinet or pantry door. Listing for one small antique / vintage mortise assembly for knob only use (non-locking).   Face plate is clean and straight solid polished cast bronze.  Maker unknown.

The best description are the pictures posted.  Use them to verify condition and dimensions.

I am happy to answer any questions you may have or to provide additional photos if you so desire but please do so before you bid.

R-141