found this information on the Tudor Monter carlo
1st generation (left 7032/0)
Ref No. : 7031/0 (fixed bezel) and 7032/0 (steel bezel)
Production Year ~ early 1970's
S/N ~ likely 75xxxx to 76xxxx
Movement : valjoux 7734 manual
2nd generation (middle 7169/0)
Ref No. : 7149/0 (fixed bezel), 7159/0 (steel bezel), 7169/0 (rotable bezel)
Production Year ~ early to mid/late 70's
S/N ~ likely 75xxxx to 76xxxx
Movement : valjoux 234 manual
3rd generation (right 94300)
Ref No. : 94200 (or 9420/0) (fixed bezel), 94300 (or 9430/0) (steel bezel), 94210 (or 9421/0) (rotable bezel)
Production Year ~ mid/late 70's to late 80's
S/N ~ likely 88xxxx to 26xxxx
Movement : valjoux 7750 automatic