Reference nos. on Rolex publications.

[katso]

Hi to you all.
I am a new member with a keen interest in in vintage Rolex's, Gallet and
Excelsior Park watches.
I have a collection of Rolex publications from the 1950's - 1970's mainly on
Explorer models, comprising data manuals, guarantees, translation sheets and
advertising literature.
I have noticed that each item is given a ref. no.
Is there any known way of determining the date of the publications from these
numbers?

Thanking you all in anticipation.