I am looking to buy a key lock for a Derby Safe circa 1872. It has a rectangular bolt pattern for mounting with the top two being 2 3/4" apart. The nose of the key lock protrudes through the door through a 3/4" hole. I will pay your price for this lock. If you think you have something that might fit even if it is not from a Derby Safe then email me a photo of what you have and I will get back to you if it will work. Guy