Remember That Time

http://www.nationalwatch.com/v2.0/InventoryImage/270508_sm.jpg

Only that it's not the 'hidden' clasp or what they call it. More like this:

http://i54.photobucket.com/albums/g88/kazume69/PICT0106-2.jpg

(Sorry it's so blur, spoiled camera)

I'm thinking of selling it to a second hand shop and I was talking to the owner on the phone. She was telling me that there was a difference in diamond size? Also, another owner told me there's a big price difference depending on the age of the rolex.

I would like to know, from all you experts here, what's your take on this. Is the model I have cheaper than the newer ones? And how much does it deserve?

Any help is appreciated, thanks!
The condition of my watch is almost brand new