Seller: clocknin (739) 100%, Location: Pittsburg, California, Ships to: Worldwide, Item: 162302144495 This is a vintage timer or time delay mortise door lock, the cylinder lock is made by Yale. Maybe the whole unit is made by Yale, just not sure. The metal part is stamped with 18273-. This unit has one key with it and when you turn it, you can hear the timer running. The latch bolt pushes in and comes out. I don't know if the unit functions correctly so I'm selling it as is. The lock box is apr. 7 inches long and 2 1/4" wide not including the latch bolt. From the center to center bolt hole length is approx. 7 1/8" L and 1 1/2" wide. The cylinder sticks out from the main body approx. 1 3/16". Comes with 4 mounting bolts that are 1 3/8" long (not pictured) Thanks and let me know if you have any questions. I'm no expert so I'll try to answer as best as I can.