Although Rolex first experimented with "3-6-9" dials before 1953, it was not until the arrival of reference 6350 that the manufacture officially used this dial configuration in their line of production.

The key objective in creating the Explorer was dial legibility. Luminous material was thus applied to the dial, with the iconic "3-6-9" numerals clearly recognizable even from far away. Unlike reference 6150, which bore Precision, reference 6350 was marked "Officially Certified Chronometer’" confirming the movement had been subject to stricter timing tests.

This example fitted with an attractive black honeycomb dial with '3-6-9' Arabic numerals, is really quite stunning. The ‘Swiss’ dial is correct, and all the luminous numerals are original to the watch. The Explorer dial also features a chapter ring, which we see on early tool watches. The numerals have aged to a warm orange tone, matching both the hands and lollipop seconds hand. The present example is part of the earlier models featuring pencil hands whereas later models features Mercedes hands.

Furthermore, the case is preserved in excellent condition with crisp edges and facets.