First introduced in 1976, the Tudor "Big Block" was a revolutionary milestone for the Wilsdorf group, becoming the company’s first automatic chronograph and Tudor's first three-register design. The “Big Block” moniker was given to the watch because of its thick mid-case required to house the Valjoux 7750 movement. With a total height of 14.5mm, it stood as one of the heftiest chronographs of its era.
Thickness aside, these Tudors were closer than ever in their resemblance to the Rolex Daytona. However, under the hood, they were years ahead in terms of innovation. It wasn’t until 1988 that Rolex followed suit and finally equipped its own chronographs with an automatic movement.
Production of the "Big Block" continued in various iterations until 1995. The most prevalent designs featured a silver panda or black reverse-panda dial paired with either a black tachymeter bezel, a bi-directional 12-hour bezel, or a steel tachymeter bezel. We have a particular fondness for the latter configuration, which is reminiscent of the legendary Daytona reference 6239, but in a more substantial modern case and at a fraction of the price.
Tudor 78360 stainless steel bracelet with 589 end links and R9 clasp code
Max Wrist Size:
Hand model has a wrist size of 6.2 in
UNWORN: Case is pristine with no signs of use. Original stickers may still be present. Dial, hands, and lume have no imperfections and may show natural, even aging.
MINT: Case has only a few superficial hairlines. Lugs are thick, full, and sharp with superb finishing. Dial, hands, and lume may have micro imperfections visible only with a loupe.
EXCELLENT: Case has very light scratches or nicks. Lugs are thick, full, and well-defined. Dial and hands may have imperfections visible upon close inspection. Lume is fully intact and may show slight discoloration.
VERY GOOD: Case may have a few moderate scratches or nicks. Lugs are thick and full but may have softened edges. Dial and hands may have light stains or marks. Lume may have cracks or discoloration.
GOOD: Case has many scratches and nicks. Lugs may show signs of moderate polishing with worn edges. Dial and hands may have noticeable stains or marks. Lume may be damaged or show significant discoloration.
Case: The stainless steel case is in fantastic condition and shows very little wear outside of a few tiny hairlines and a couple micro nicks. The lugs are thick and sharp with nice chamfers and superb definition between brushed and polished surfaces. The polished steel bezel shows minor signs of wear upon close inspection, with a few tiny nicks scattered throughout and at the edges. The overall condition though is remarkably clean, and all numbers retain their black filling. The caseback is also in amazing condition with little-to-no wear. The Rolex engravings remain sharp and deep.
Dial, Hands, & Crystal: The glossy black dial has been very well-preserved and is free from any notable imperfections. The steel indices and polished hands show faint signs of oxidation upon close inspection, but remain very nice overall. The tritium is a light shade of cream and exhibits no lasting glow when exposed to UV light. The acrylic crystal is free of any major dings or scratches and has plenty of life left to give.
Bracelet/Strap: The stainless steel bracelet shows very little stretch and virtually no signs of wear. The clasp is free from any desk diving marks and the Tudor stamp remains nice and detailed.
Functions: All functions including the crown winding, time setting, date changing, and chronograph start/stop/reset are working as expected.
Service History: Unknown.