Well, I finally bit the paper patched bullet and ponied up for a Gibbs Farquharson!

I feel fortunate to have found a .461 No.2 as original and ungoofed with.
Interestingly, it is a pretty late build, pat. use #913, and Metford use #1843 and could very well be the last .461 made.
It has Birmingham proofs and a couple from the Vienna proof house.
Overall excellent condition right down to the spare front sights stored in the grip trap (two fine bead steel and one made of ivory!
It is sighted for the 100gr charge with the 360gr. bullet. Oh yes, the bore is absolutely as-new!!
I especially like the sculpting of the trigger guard around the hammer hinge pin.

These are the seller's pictures - I will take some full length pics soon.