Banzaibird,

I'd bet you can find a picture of a round action, ie, trigger plate action, ie, blitz action on www.mckaybrown.com

Davis Mckay Brown is a current Scottish maker making both shotguns and rifles using the round action. There was a thread here a couple of months ago titled something like "Which Would You Prefer" that paired a Mckay Brown 470 and, I believe, a Westley Richards droplock.

JPK