I am not yet certain of the build date but the gun's serial number is 264XX. This would seems to make is a couple of years past the expiration of the patent expiration for the rebounding hammers. Therefore, my guestimate of 1882/83.
It does have a dolls head.
I find it very interesting that these guns were built for the American market. Wonder what made America's pigeon shooters more interested than those of other countries. Did Greener build the same gun, with a different model designation for the home market?
The fact that the original load for pigeon shooting was a 10 gauge shell, it must be that the 12 gauge Trap Gun models were possibly meant for waterfowl. ????
Best,
John