There were two production runs of these; one with pinned barrels from about 1972 stamped 60-1, and another from 1985 for the John Jovino company in NYC stamped 60, which is probably the one TS had. (There was another 60-1, 2" with adjustable rear sight, also from about 1985.)
Either 3" variation is worth more than the much more common 2" - call it $500 and up for the later one, and higher for the early, depending on exact condition.