Every time I see these I find they are the next best thing to a classic PP Calatrava without the costs involved of owning one but with the upside of a classic IWC movement and simple & perfect solid gold case. The watch is very clean overall with its original dial, lume and an even blue hue patine on the dial.
 
Details:
 
Brand: IWC Schaffhausen
Model: Automatic 
Reference: 309A
Year: 1960's
Material: 14k Yellow Gold
Dimensions:  34mm
Crystal:  Plexiglass
Movement: Automatic Cal 853
Bracelet/Strap: Wristwatchme Leather Band
Box/Papers: No/No