Rolex's Explorer II Reference 16550 replaced the much-loved Reference 1655, which was a modernised version of the brand's historic Explorer wristwatch line. The unique design was originally intended for speleologists with a fixed, engraved bezel calibrated to 24 hours and an additional 24-hour hand that allows the wearer to easily know the exact time by distinguishing between day and night.

Reference 16550 was a milestone. Introduced in 1985, it was the first Rolex model equipped with scratch-resistant sapphire crystal. Produced for only a few years, specimens with a white dial became a collector's favourite as the contrast with the yellowed triads is more striking; this type of dial was nicknamed ‘Corn Beans’ by collectors.

This watch has been preserved in excellent condition and is still accompanied by its original set including box and guarantee.