Colonial Choketubes?
 

Recently had a Win 25 in 20" Cyl Bore 12 ga. adapted to Colonial ck tubes in thin wall lead only. When I got it home and looked closer, it resembles the ck tubes in my EAA IH27 O/U. Does any one know if these are the same? Ive lost my EAA instruction book. Any help would be appreciated. Thanks Crowcommander

Your best bet would be to ask the guys that did the work on the gun. They should know if the choke tubes are the same or not.

Colonial tubes
 

I think you'll find that the thinwalls are probably too small for the EAA gun Try 'em though All depends where the EAA was threaded. If in the US may have the same threads