Vintage 1939 Rolex Oyster Chronometer - "Bubbleback" Men's watch is in good cosmetically and mechanically condition. 
Comes with new Genuine Lizard Black Band. 
Thickness of case ~ 14mm.  
14k Solid Gold case with stamps inside. 
32mm Case size. 
Ref. 3131. 
Weight with leather band approximate - 45.5 grams. 
Minor signs of wear (scuffs) on the case. 
See photos, please.