They article in the link I posted above says Remington introduce the LT-20 skeet version in 1977 and field grade in 1978. I does not say when they stopped making plain barrels, but it was sometime in the mid 80's if I remember correctly.
Michael
I cross-referenced these
https://www.petersenshunting.com/ed...n-model-1100-autoloading-shotguns/272354https://www.shotgunworld.com/bbs/viewtopichttp://guncollectionsonline.com/remington1100.htmI was just looking at the Barrel Code and W being August for the Month And T being 1970
Tomorrow I am going to try to find out when the white diamond grip cap was used on the Remington 1100 20 Gauge LT
And try to find out other identifiers to what I have.
Thanks