Reference Number dashes ???

[Lex_Ordo]

I think I know the reason, but would like to hear from others.
What are the reference number dashes indicative of?

For example:
GMT Master II ceramic

116710-001
116710-002

[stylinleems]

I believe it indicates the dial color.

Both my Daytona's indicate:

M116500LN - 0001 - White Dial
M116500LN - 0002 - Black Dial

[Lex_Ordo]

IDK... ?

I have the BLNR and the dial is black. the reference is 116710-002
I thought it might have something to do with the release of the reference modifications.

116710-001 is the original GMT Master II ceramic LN. It has a black dial and bezel.

My 116710-002 is a GMT Master II ceramic BLNR. Black dial as above, and the Blue/ Black bezel.

Hopefully we'll hear from the experts on this.

[3ther]

This is part of the new RMC or Rolex Master Code. The US was the last to adopt it. The first portion is the reference number and the -xxxx portion refers to the dial/bracelet option. There unfortunately is no standardization across the board like there used to be (ex 3g always used to mean black diamond dial regardless of model)

[georgekart]

Originally Posted by Lex_Ordo

IDK... ?

I have the BLNR and the dial is black. the reference is 116710-002
I thought it might have something to do with the release of the reference modifications.

116710-001 is the original GMT Master II ceramic LN. It has a black dial and bezel.

My 116710-002 is a GMT Master II ceramic BLNR. Black dial as above, and the Blue/ Black bezel.

Hopefully we'll hear from the experts on this.

The 116710LN-0001 has a black dial with green GMT-MASTER II lettering. The 116710BLNR-0002 has same lettering in white. Hence, different dial. Also those numbers specify not only dials, but bracelets on watches where you can have 2 types (even numbers are Jubilee on DJ41 for instance, but odd number one less than even number is same dial with Oyster) and AFAIK handsets. Check the YM2 for that that had handset switch, but everything else remained the same. Basically those 4 digits specify specific details about each model.