Mike
Someone has taken a center punch and drove a divot in the sear on the tumbler in ( I think) an effort to try to solve some problem. anyway the gun is now unsafe due to the damaged sear notch. It is going to OK to a repair service there that works with the Purdy firearms. I can repair most problems with guns but this is out of my league. As well as it being appraised at $25,000 I would rather an expert work on it.
You never know what will walk through the door for repairs.