So the 4 lines 14060M becomes the most short-lived sub huh?
It is the most short lived modern Submariner.
6204 1953-1955
6205 1953-1957 (some books 1953-1955)
6536 small crown 1955-1958
6538 large crown 1955-1958
6536-1 chronometer 1957-1961
6538 chronometer 1957-1961
5508 1958-1959 (some books 1958-1965)
5510 1958-1959 (some books 1958-1965)
5512 COSC 1959-1978 (some books 1959-1970)
5513 1962-1990 (some books 1962-1989)
14060 1989-1999
14060M 1999-2007 (aka 2 line)
14060M COSC 2007-2012 (aka 4 line)
The 14060M COSC is the only other COSC Submariner since the 5512. Its 5 years life span makes it the shortest lived modern Submariner, followed by the 14060M at 6 years.
The chart does not include the COMEX and military issued Submariners, reference 5514 and 5517.