ROLEX RARE VINTAGE EXPLORER OYSTER PERPETUAL PRECISION YEAR  
TWO TONE STEEL & 14k GOLD
This two-tone model 5501 was introduced in about 1958.  
It has a caliber 1530 movement.
ALSO, it’s pretty COOL this watch has the 1002 case back, WHICH is RARE.

SPECIFICATIONS
Model case: Model 5501 Explorer Oyster Perpetual Precision
Diameter: 34 mm
Material: Stainless steel & 14k yellow gold
Bezel: 14k yellow gold fluted bezel
Crystal: Acryllic
Movement: Perpetual, mechanical, self-winding Caliber 1530 butterfly rotor
Strap: leather strap with Rolex bucle
Dial: cream with gold markers and hands. Says “ROLEX, OYSTER PERPETUAL, EXPLORER, – T SWISS T –