This vintage Rolex Oyster Bubbleback is an example of the excedeengly rare 620NA movement. Comes with a brand new leather band, works well with a clear glass and very good condition case and crown. 
 
*** The pictures may show the reflection of the camera lens, black spots mostly ***

Details:
 
Make: Rolex Oyster Perpetual
Model: Oyster Perpetual Date
Reference: 6074
Year: Approx 1953
Material: 18k Gold
Dimensions: 36 mm
Crystal: Plexiglas
Movement: Automatic
Bracelet/Strap: Leather
Box/Papers: No/No