The inscription "T SWISS MADE T" on a Rolex watch is a subtle yet significant indicator of its age and history. It represents a transitional period in Rolex's production, specifically around the late 1990s, marking a shift away from tritium-based luminous material and towards the safer, non-radioactive LumiNova. This seemingly small detail offers a fascinating glimpse into the evolution of watchmaking technology and the enduring legacy of Rolex. Understanding this marking requires exploring several key aspects: the meaning of "T Swiss Made T," the dating of watches bearing this inscription, the impact on watch values, and the specific models that feature it.
Rolex "T Swiss Made T" Meaning:
The "T" in "T SWISS MADE T" refers to the presence of tritium, a radioactive isotope of hydrogen, which was commonly used in watch dials and hands to provide luminescence before the late 1990s. Tritium emits a soft, persistent glow, making it ideal for timekeeping in low-light conditions. However, due to its radioactive nature, concerns about safety and environmental impact led to its eventual phasing out in favor of alternative materials like LumiNova. The "T SWISS MADE T" marking, therefore, indicates a watch produced during the transition period when tritium was still in use but the industry was moving towards safer alternatives. The "SWISS MADE" portion, of course, confirms the watch's Swiss origin and adherence to Swiss watchmaking standards. The double "T" suggests a more prominent use of tritium, possibly in both the hands and hour markers, compared to watches with a single "T" indicating a more limited application of the material.
Rolex "T Swiss Made T" and Dating:
Pinpointing the exact years during which Rolex used the "T SWISS MADE T" marking is challenging due to the gradual nature of the transition. However, watch experts and collectors generally place this period around 1998. This aligns with the broader industry shift away from tritium, with most manufacturers completing the transition by the end of the 1990s. Therefore, finding a Rolex with "T SWISS MADE T" strongly suggests a production year near or around 1998, making these watches highly sought-after by collectors interested in transitional pieces.
Determining the precise year of a specific Rolex watch requires a thorough examination of several factors beyond just the dial marking. The reference number, serial number, and caseback markings all provide valuable clues. The serial number, in particular, is crucial for dating Rolex watches, as Rolex uses a specific system for assigning serial numbers that correlates to the year of manufacture. Resources such as the Vintage Rolex Value Guide and online forums dedicated to Rolex collecting can provide detailed information on dating specific models and deciphering serial numbers.
Rolex 25 Jewels Swiss Made & the "T" Marking:
The phrase "25 jewels Swiss Made" often accompanies the "T SWISS MADE T" marking. This indicates the number of jewels used in the watch's movement. Jewels, typically synthetic rubies or sapphires, are used as bearings in the watch's mechanism to reduce friction and wear, contributing to the watch's accuracy and longevity. A 25-jewel movement is a common standard for high-quality mechanical watches like those produced by Rolex. The presence of "25 jewels Swiss Made" alongside "T SWISS MADE T" further reinforces the watch's Swiss origin and high-quality construction.
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