I have a straight-stocked Marlin 336 in .30-30 made in 1966 (AB serial number). Bad pic but here it is...
Whoever owned it before took the time to set it up right. It came with an old Williams peep sight, the original rear sight removed and replaced with a dovetail blank.
From traces on the bluing it apparently had a saddle ring at one time, this too has been removed. From browsing this and other boards I would guess I have the "Texan" version.
But the 20" barrel is stamped "336 RC". Were "Texan" versions stamped "336 T" ?
Also, as a point of interest it has the rounded rather than stamped lever, what year did they transition to a square lever?
Thanks,
Birdwatcher