I also can’t help but notice the hammer faces nor the stops appear to be aligned with the centerline of the bore. I suppose it could be some sort of trip for an internal firing pin? I think Purdey would have scoffed at adding another “sear” as it would only increase lock time.
My bet is the hammers are either passive cocking indicators in a self cocking design or they are used to manually cock the locks of a design similar to the Grey patent.
I sure wish we could see the patent info on the actions
In a similar, but unrelated discussion about a Moore and Grey gun there was a question as to why they used / retained the pinfire style hammers and it was discovered on the gun I had that it was a “non-rebounding” design and the hammers over the top of the barrels required they be put to half cock before the gun could be opened, thereby protecting the firing pin noses. If I recall correctly pulling the hammers mechanically retracted the firing pins.
So many fun guns!
