Need advice: Dates of introduction of new features on Datejust & Jubilee bracelet

[swabbie]

I need advice on how to find a pre-owned two-tone Datejust watch
online that has these two features.

1) Serial number view able on the Rehaut at the 6 o'clock position.
These models also have the word ROLEX etched over and over again
going around the inside of the watch, just under the sapphire crystal,
and above the dial.

2) On the Jubilee bracelet: I'm looking for solid links of gold on inner
three rows. (as opposed to hollow oval links)

The question is: since I'm looking online, and can't see the watch first,
how do I know if the watch has these two features. Is there a model
number and date of manufacture that Rolex started including these features?

Thanks (in advance) for your help.