Discontinued. Use 301078 as replacement.
Replacement for Marks 22 Series Mortise Lockset.

Double Cylinder locks with 2 keys.

Center of knob to center of key: 3-11/16 inches
Box thickness: 3/4 inch
Box faceplate: 1 inch x 7-1/8 inches
Backset: 2-1/2 inches
Box (not including faceplate): 3-5/16 in x 5-1/2 in

HANDING INFO: OUTSWING DOORS
NOTE: PLEASE read all information; View All Images
Key can be above or below handle, if key is opposite of diagram, then handing changes from RHR to LHR.
THIS LOCK HAS KEY ABOVE HANDLE
When standing on the outside of home and the handle is on the right, this is a Right hand Outswing Door or Left Hand Reverse (LHR)
Handing can be Reversed, better to get the correct handing up front.
Please see additional pictures for more illustrations.

Marks USA Original Hardware available; see Item 301078.

Door can be opened from both sides when deadbolt is not engaged except when stop-button is engaged; then door can only be opened from inside but is locked from outside and can only be opened with a key. Deadbolt can be engaged or disengaged with key from either side. Deadbolt deadlocks latch.

Used primarily with steel security and ornamental doors.

Check function and handing before installing. Bevel latch may need to be reversed for panic release to work correctly.

Resources:
How to Rehand Marks Mortise Locks (Article | Video)