Help with referencing the production date of Gmt ii C LN

[uddind]

i bought a Rolex GMT master ii black Ceramic from a pawn broker in UK called H&T pawnbrokers. only came with box and certificate of authentication card from pawnbrokers. These pawnbrokers are one of the largest in UK and check database with rolex when buying.

Paid £6,265 for it last month which is pretty good considering its discontinued. Condition was really good.

It has the blue lume indicies on dial and bead blasted clasp.

I was wondering when rolex stopped the greem lume and introduced the chromolight. I know they stopped with the bead blasting as well.