This view from the action top shows what I think of as the standard Webley Bain dolls head. And the "Patent" written around the top lever suggests early, while the patent was still in use (the two later ones I own don't have this text) I don't have a pic of yet, but the water table has some interesting stamps, plus an Anson & Deeley patent use number.

Where it gets interesting is the top tang...note there's no safety. But there is a safety, it's on the bottom tang. i don't know that I've seen this before.

Here's the bottom tang. Push that little button forward (towards muzzles) and it's on safe. Back is fire.