.44 British Bulldog revival

[tokguy]

That dongle behind the trigger is your single action sear. They are present on most of the and old, lower budget double action revolvers with the single action function (both British and American Bulldogs, Iver Johnsons, H&Rs, etc). Just an FYI If your hammer fails to hold in the cocked position, it's probably the spring on that sear.

I agree that it's hard to identify with no markings. I have an antique (with serialized letter) Iver Johnson American Bull Dog in 44. It has an octagonal barrel.

F-I-L has the same unit ( W/ Oct bb l) . His is tied up in Estate... no idea who to give it to.
OP's sure looks like an F & W...but the ejector system is all wrong...they have the Tranter system ( I think ?)