Hi, I have a Milner 212 which is built into a wall in my property. Unfortunately it has no key , luckily it is not locked. Can anyone provide any information on it ie age etc. It has a serial number of 6416 on the body and then 945 on the rhs of body near the hinges. Would anyone be able to advise also on where I would be able to get a new key cut. I have removed the lock so it could , if needed be sent off to have this done. Many thanks, Pete