Rolex Datejust Lady - features a 26mm stainless steel case with an 18K rose gold domed bezel.
Silver dial with Roman numerals.
Stainless Steel and 18K Rose gold Oyster bracelet.
The Datejust is the best selling Rolex model on the market, and has been for decades. 
It was first introduced in 1945. 
The Lady Datejust is in a 26 mm case and comes in a combination of steel & in this case, 18K Rose gold.
Rolex acknowledged that the combination metal watches were popular & fast sellers and this has proven to be the same for the Ladies watches.
The bezels can be fluted or smooth - all have a date at 3 o'clock.
Functions - hours, minutes, seconds, date. 
Screw down crown & solid caseback.
Combination steel & rose gold jubilee or oyster bracelet with an integrated folding clasp.
Dial versions are numerous - black, white, salmon, mother-of-pearl, silver with just as large a variation on the hour markers available.
There are dials that offer diamond hour markers, white stick markers, Roman or Arabic hour markers. 
Rolex has made sure to provide a version to meet the most discerning taste.
Automatic Caliber 2235 self-winding mechanical - COSC certified movement
42 Hour power reserve 
Scratch-resistant sapphire crystal
Water-resistant to 100 meters / 330 feet