Antique Door lock set made by Chicago Lock Co.  

Mortise lock is marked: Pat'd June 25th 1878
This is a heavy matched set made of cast bronze
Has fine casting details with the knobs having a small beaded outer rim with little ware.
Chicago Lock Co. made their own style of locking mechanism that does not use a spindle.
The ends of the knobs were made to interlock into the mortice lock. Actually works very well.
This set is in excellent condition with original finish, ready to install.
Has a 2-5/8" backset: [distance from center of knob to face plate] Mortise lock: 3-1/2" wide x 4-1/4" high
{2} door plates are 10-1/4" x 3-1/4" at widest section. {2} knobs are passage size: 2-1/4" Would fit a door up to 2-3/4".

Price: $250

Item # 1300