No, there is no link or anything like that, just years of collecting data.
Yours is a 1969 as well and in the 1969 catalog it states that the 30" barrels were mod/full chokes.
The letters you were looking at were inspectors markings and assembly marks. The date codes are the two stamps with the "W"'s in them, "W" was the date code for 69.
Bookmarks