Launched in 1985, the Rolex Explorer II reference 16550 was the first to be fitted with a scratch-resistant sapphire crystal. Only in production for less than a handful of years, it has become a favorite amongst collectors of Rolex sport watches. Due to a flaw in the paint used for the dials, watches with originally white dials are often seen with tones that have aged to pleasing shades of ivory or cream.

The most coveted among these are those fitted with “rail” dials, as found on this well-preserved example. The term “rail” is used to describe the near perfect alignment of the vertical space between the text written across the two lines on the dial at 6 o’clock. You will notice “Superlative” and “Officially” are on the left, while “Chronometer” and “Certified” are on the right.

In addition to the color change, the dials of the 16550 were made using a glossy, lacquered finish, giving them a porcelain-like look. The white gold applied luminous hour markers complement the dial of the present example, and is different from dials used in the reference 16570, its successor, that used black hour markers.

Accompanied by its original guarantee certificate, this watch impresses with its exceptional condition and gorgeous cream-colored dial.