Men's Rolex 40mm Explorer II Stainless Steel Watch with Oyster Band and White Dial. Pre-Owned SN# U58**** Year: 1997. Brand: Rolex. Gender: Men's. Type: Wristwatch. Case Size: 40mm. Dial Color: White. Model: Explorer II. Band/Strap: Bracelet. Indices: Non-Numeric. Condition: EXCELLENT. Band Material: Stainless Steel. Hour Marks: Round / Baton Indexes. Movement: Self-Winding (Automatic). Service: Complete Service Overhaul on 12/03/2024. Box / Certificate: Rolex Box / Certificate of Authenticity. Service Warranty: One (1) Year Limited Service Warranty. Additional Details: This Rolex Explorer II is marked with the "T SWISS T <25" tritium stamp, yet it incorporates Luminova luminous material for the hour markers and hands, resulting in a unique hybrid dial. Such dials are uncommon and are often regarded as collectible. Transitional period: During the late 1990s, Rolex moved from radioactive tritium lume to the non-radioactive Luminova. "Tritinova" dial: To use up old stock, Rolex stamped dials with the "T SWISS T <25" tritium mark but filled the markers with the new Luminova material. Characteristics: The dial is stamped with "T SWISS T <25," but the hour markers and hands glow with Luminova. Rarity: These transitional dials were produced for only a few months and are found on watches with serial numbers from the late U range.