The Rolex Submariner Date 16618 (often called the "Bluesy") with an 18k yellow gold 40mm case, blue sunburst dial, tritium lume, and Solid End Links (SEL) represents a specific 1990s configuration produced before Rolex phased out tritium in 1998. While stainless steel Submariners did not receive Solid End Links until around 2000, solid 18k gold models like the 16618 featured them much earlier in the decade.

• Case & Bezel. The 40mm Oyster case is crafted from solid 18k yellow gold with drilled lug holes and a unidirectional bezel fitted with a blue anodized aluminum insert. 

• Dial & Tritium Lume. The sunburst royal blue dial features applied 18k gold-surround hour markers filled with tritium. Original tritium dials bear the "SWISS - T < 25" signature at the 6 o'clock position and will no longer glow brightly in the dark, often developing a warm cream or off-white patina over time. 

• Bracelet & SEL. The 18k yellow gold Oyster bracelet (ref. 92908) uses Solid End Links that attach flush to the case, providing a tighter, more substantial feel than the hollow end links used on steel models of the same period.

• Movement. Powered by the automatic Rolex Caliber 3135, a 31-jewel COSC-certified chronometer offering a quickset date, hacking seconds, and a 48-hour power reserve. Early 1990s examples also retain the original champagne/gold date wheel with "open 6s and 9s".