When talking condition, clean watches are always the one way to go in vintage, yes it stings when you purchase it but you will never regret it. The watch is very clean overall with stickered caseback and heavy patina on the bracelet, it is as close to NOS as you can possibly find and is the transitional type, with 14k bezel and band, a rare 1979 occurence.
 
Details:
 
Brand: Rolex
Model: Datejust
Reference: 16013
Year: 1979
Material: Stainless Steel & 14k Gold 62523H-14 Bracelet
Dimensions:  36mm
Crystal:  Plexiglass
Movement: Automatic Cal. 3035
Bracelet/Strap: Original Bracelet
Box/Papers: No/No