Rolex Clasp Number

[lukestafford77]

Hello I am seeking some assistance in trying to understand the numbers on a Ladies Gold Date Just I own.

The watch has a K Seriel number, and was purchased new in 2003, model number is 79178.

I have no worries about the authenticity of the watch I am meerly trying to educate myself as far as rolex bracelets and clasps are concurned.

The clasp has the number 7204a on it, as well as DE12 (Which I believe means the clasp was manufacterered in December 2001).

7204a I have assumed to be the model number of the clasp and bracelet? Is this correct? However haveing dug a bit deeper (or should I say putting this in to google) it seems to indicate that 7204a is the model number of a stainless steal bracelet from around the 60's?

If anyone can help explains this to me, or perhaps point out where I am going wrong that would be great.

EDIT: It also has end links 66B.