Battle,
Reading this thread made me curious about the dimensions of my 2" guns, so here are some numbers for you. Unfortunately, I do not have a lightweight (6# 2 oz or 6# 3 oz) 2 1/2" 12b to compare them to, but maybe you do.
The 26" barrels on my 2" 12b weigh 2# 2.8 oz.
That is less the lightest 20b barrels I have (2# 4.5 oz), and within an ounce and a half of those on my 28b, which has a total weight of only 4# 9.5 oz.
The 2" barrel walls are .030", I really expected the thicknesses to be .022" to .025".
The firing pin centers are 1.035". My 20b, which is a 5# 2.5 oz gun, is .993".
I have another 2" that is 4-5 ounces heavier, but the centers on that gun are .980", less than on a light weight 20b. That is amazing, to me.
The action bar width on the 2" is 1.440" at the angle, on the 20b is is 1.453". So apparently it is on a 20b sized frame, at least width-wise.
One of my 2" guns was proof dated in 1933, the other in 1934, just as Lagopus indicated.
