It seems there were only 7 32" barreled 20 ga. L.C.'s made from Olympic Grade to A-3. From 1907-1918 After that the only breakdown would be the Cody Museum. There was 1 A-2 out of 200 total guns made, 2 Premiers out of 28 guns made, 2 Monograms out of 128 total in the first serial number series, and 2 out of 138 made in the second series serial numbers. No Deluxes, Grown Grades and Olympic Grades with a 20 ga. 32" barrels. Also there are no 16 ga. 32" barrels in any of those grades.
So no matter what grade you have, you are lucky to have one. It's hard enough finding a 32" barrel in a Field Grade.
In Chuck H. area in the 20's there was a gun club in the bay area I believe that specilized in 20 ga 32" barreled guns.
Revdocdrew knows the name of the club, it slipped my mind.