.
1971-1984 - Rolex Explorer II 1655 - Cal. 1575GMT, 39 mm
1985-1988 - Rolex Explorer II 16550 - Cal. 3085, 40 mm, adjustable GMT hand
1989-2007 - Rolex Explorer II 16570 - Cal. 3185
2007-2011 - Rolex Explorer II 16570 - Cal. 3186, "ROLEX ROLEX" rehaut
2011-present - Rolex Explorer II 216570 - Cal. 3187, 42 mm