Inside has been cleaned and oiled.
Misses cylinder. 
Misses cylinder locking fillister screws to prevent rotation of cylinder.
Can be either left or right handed, open the mortise plate and rotate the latch.
Latching and double pin mechanism work as they should 
Plate screw spread is 7"
Plate is 7-11/16" X 1-3/16".
Mortise body is 5-1/2 X 3-7/8" X 1-1/16".
Spindle setback / back set 2-3/4"
Spindle hole is for 11/32" square spindles.
PN: 6840-1/2

5321-1