I have an opportunity to buy a .455 Webley Mk VI which is described as follows:

"Good overall condition. Replacement grips. Darkish bore with good sharp rifling. Slight slop in action, comes with Simplex 7/8" dies & some empty cases. Serial No. 409344."

I emailed the dealer about the 'slight slop' and received this reply:
"The action is a top break with the locking/opening latch coming over the rear extension of the top strap. There is about 0.0025" play between the top of the top strap and the bottom of the latch. I do not have any previous experience with this make/type of pistol so don't know how much play would normally be there but I would expect it to be minimal. I imagine that it could be repaired if required but do not know if it adversely affects its operation or safety." He has also confirmed that the numbers match on the barrel, frame and cylinder.

The gun is some distance from me but I could have a relative check it over. Thoughts on the condition as described and any other 'what to look for' advice would be appreciated.