gunlvur, that is not the typical buttplate. Most were a hard rubber (gutta percha) with the horizontal lines.
Most of the Field Grades were hardware store guns and came through with mod/full chokes. The hardware store when ordering from Hunter Arms could put in an order for imp.cyl/mod to carry a different selection for customers.
The chambers should be 2 9/16". As stated the 16 gauge was the last one to have them changed to 2 3/4" and earlier 16 gauges that do have 2 3/4" are usually stamped Chambers 2 3/4 Inches in an oval on the barrel's water table. I have one from 1939 that still hase 2 9/16" chambers.
As to the price, sounds right if as you described.
