Buss- I concur. My friends' M21 12 Skeet- 26" WS-1 and WS-2, pg, bt. sst, ae- checkered butt- has the same plain jane un-engraved lines-with the side bolsters-arrow shaped, as my (inherited) M21 made 1946-1950 SN 15992- with 28" barrels, pg, splinter fe, ae, sst-factory red 1922 pat'd pad-- His gun weighs 7 lbs. 10 ounces, mine weighs 7 lbs. 4 ounces- Just for fun, I took my Galazan brass tubular drop-in choke gauge- my right bl. is imp. cyl. same drop in "sticky-tight" fit as his WS-2 choked left hand barrel. His right barrel WS-1 indicated aprox. .0030" constriction at muzzle- but the internal choke taper for the WS-chokes is of a different radius pattern cut then that found on the std. field chokes- those, I believe, gauge out on a 17' radius- Best-- RWTF
