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Tudor Oysterdate Big Block ref.79170 Full-Set from 1993
Tudor Oysterdate Big Block ref.79170 Full-Set from 1993
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The Tudor Oysterdate Big Block ref. 79170 is one of the most charismatic chronographs of the 1990s, standing as a bridge between Rolex’s craftsmanship and Tudor’s emerging independent identity. Produced in 1993, this particular example is a Full-Set piece — complete with its original box and papers — and remains unpolished in immaculate 10/10 condition, an exceptional state for a watch of its era.
What makes the Big Block so distinctive is its thicker mid-case, noticeably more robust than that of the Rolex Daytona from the same period, earning it its famous nickname. Inside, it beats the reliable automatic Valjoux 7750 caliber, marking it as Tudor’s first self-winding chronograph — a significant mechanical step forward from the manually wound Daytonas of the time.
Constructed during the period when Rolex still manufactured Tudor’s cases, bezels, bracelets, and even dials, the 79170 carries unmistakable Rolex DNA throughout. Its plexiglass crystal adds a warm, vintage character, perfectly complementing its tool-watch aesthetic and enhancing its nostalgic appeal.
Altogether, this 1993 Tudor Oysterdate Big Block ref. 79170 is a superbly preserved, historically important chronograph — one that combines Rolex build quality, Valjoux mechanics, and timeless vintage charm in a single, collectible package.
Brand: Tudor
Model: Oysterdate
Reference: 79170
Year of Manufacture: 1993
Serial Number: B55x,xxx
Material: Steel
Dimensions: 40mm
Crystal Material: Plexiglass crystal
Caliber: Valjoux 7750
Movement Type: Automatic
Bracelet Size: 20mm
Bracelet: Tudor 78360 Oyster bracelet with 589
Box/Papers: No
Mechanical Functioning Guarantee: 6 Months
Comments: The watch is working correctly, however, its service history is unknown, never polished.




