According to Ned Schwing's book, your frame was made during the first year of production - 1931. Hard to estimate when the gun was actually finished.

"Skeet" was a grade - not a designation of intended use. The skeet guns typically had a BT forearm and checkered butt. To reinforce the point, I have a 2 barrel set 20 gauge Skeet grade gun with 3" chambers in each set of barrels - 26" IC/Mod, and 28" Mod/Full.

Suggest you ask your question on the M21 forum - http://www.model21shotgun.com/

Last edited by tudurgs; 01/06/11 09:39 PM.