GMTII -C series..

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Originally Posted by CompactRod

The last series is Z.. my AD told me the lastest is M series. Is he correct?? what comes after M? the series are not name in sequence.

C,

Rolex has been using a letter prefix in their serial numbers since 1987 when they started using R.

They went through R,L,E,X, in sequence (no 0 since it looks like o) up until early 1993. In 1992 (yes it overlapped by a year) they began random letters as a prefix until we are where we are at today with the Letter "M" being the ones just recently released.

To date they've used 18 letters.