I tried searching for the name without a gun association as you suggest. Tried Wyman Company, Henry Wyman, Harry Wyman, etc. no luck. I get hits but nothing that points to guns, or hardware. There is a Wyman and Sons Ltd, London, but it's 1902 and seems to be no association with guns. Have seen several guns that show similarities but nothing dead on yet. The Scotts are very close, but I can't say for sure. Seem to be several with almost identical receivers. Tacky's R.Grove gun is very close, but different locks. I think it is a hardware store gun. I'll look up JP Clabrough tomorrow. I have learned here that it is a bar action side lock, with Birmingham proofs, made between 1875 and 1886, but may never know who made it. Any idea how to find out who cast the action, or made the locks without removing them? I'm kind of scared to try to remove the locks. A broken screw would be disastrous. What's a POW grip?
