Selling an antique Vintage Sargent & Co. Interior Mortise Lock Door Hardware with stamped numbers that are either #816 or #918, depending on which direction you read the numbers.  The face plate is 1" wide x 6-1/4" long with screw holes 5-1/2" apart on center.  The lock body is 4-1/2" x 3-5/8" and is 5/8" thick.  There is a slight bend to the brass face plate on one end and slight dent in the brass on the backside of that face plate.  No key.  Free shipping in the USA.