Datejust with Turquoise dial

[Namakan]

First post here so be patient. I've been looking for a 36 Datejust for my wife and found a few with the turquoise dial I think she would love but I'm having difficulty finding any historical information on these.

Swiss-Wrist has a few on their site and the description states "custom turquoise dial". Is this a situation where they replace the original dial with a turquoise dial?

If anyone can shed light on when Rolex actually produced the Datejust with this dial option I would appreciate it.

Thank you!