This is the lock from my front door I have no idea how old it is on one side it has a date of nov. 10 1878 0n the other side it has what looks like a large C with a smaller p&e or p&f inside the C. It takes 2 keys and it looks like it takes 2 knobs one on both sides of the door and one on the inside only. I need help in finding out all I can on the lock and where I can find the keys and the inside knob. I will try to post some pictures so thanks in advance for your help Jim


