Lancaster's actions and general level of quality are in a completely different world than what we're seeing here with the gun on the gunbroker site.
The hammers do appear to be 'lancasterey' in shape, the way they hit the (and I'm convinced of this) conversion-to-central fire strikers somewhat resembles 'lancasteresque' function.
I agree with Raimey that the marks described sound like european, not british, and point very suspiciously to Belgium.
This ain't the first Belgian gun that's had the word 'London' washed in gold or silver on the rib!
Without any doubt, if only from the grainy photos on the auction site, the gun is not a westley richards product.
Furthermore it does not seem as if the seller has a very firm grasp on what he has, how to handle it, or how to describe it's form, function, or condition.
Crusher, if you like it, bid it up till it's yours.
I think the Gunbroker site will keep the auction open indefinitely if there is a challenge in the last few minutes, so you can make sure you get it if you're there at the end of the bidding.
--Tinker
