The reference 16800 marks a watershed moment in Submariner evolution, representing the transitional period when Rolex moved from acrylic to sapphire crystal while retaining the matte dial aesthetic that defines vintage tool watch appeal. Introduced in 1979 and produced through 1988, this reference bridges two distinct eras of dive watch design. This 1987 example captures the 16800 in its final production year, displaying the characteristic traits that made it a workhorse for professional divers and collectors alike—unguarded crown guards, aluminum bezel insert, and the honest proportions of a pre-ceramic Submariner that wears with purpose rather than presence.

The 40mm stainless steel case houses the caliber 3035 automatic movement, Rolex's first high-beat chronometer movement with quickset date functionality introduced in 1977. Operating at 28,800 vibrations per hour with a 42-hour power reserve, the 3035 delivers the reliability expected from a certified chronometer while offering practical daily usability through its independently adjustable date mechanism. The unidirectional rotating aluminum bezel and sapphire crystal protect the black dial, maintaining the 300-meter depth rating that established the Submariner's credentials as a legitimate professional instrument.

At 40mm, the 16800 offers the ideal proportions for those who find modern sports watches overwrought—substantial enough for presence, restrained enough for versatility beneath a shirt cuff or wetsuit. The surviving original boxes and papers provide complete provenance for this example, though the watch requires professional refinishing to achieve optimal presentation. For collectors who value the narrative of transitional references and the honest aesthetic of pre-Maxi dial Submariners, the 16800 represents the last of its kind before the model evolved into the more refined 168000 and subsequent five-digit references. This is foundational Rolex, before the hype, when tool watches were still tools.