Inherited this. It's missing the cylinder and pin. I think it's a H&R 922, 4" barrel. No caliber marking on the left of the barrel, but it does have 82 engraved on the bottom of the barrel...Any ideas?
Your "HUNTER MODEL" is based on the Model 1906 frame. As stated above, someone has trimmed the original 10" barrel. The early model Hunters had a round barrel, like yours, and the later models were octagonal. This model was cataloged from 1924 until 1930.
With best regards,