The year 1976 saw the launch of the third family of Tudor chronographs, known as “Big Block”. With the Prince Oysterdate models, the brand presented its first chronographs equipped with a self-winding mechanical movement and confirmed what the Oysterdate family had begun. Tudor offered immediately recognizable chronographs with excellent technical qualities just like the bigger brother Rolex Daytona line of chronographs. The movement uses the Valjoux caliber 7750. Having the same diameter as the manually wound Valjoux 234, 30.4 mm or 13 lines, it was 1.5 mm thicker than the latter and had a frequency of 28,800 beats per hour.
The architecture of this new movement leveraged by Tudor at the time brought about a reorganization of the dial with the addition of an hour counter, the transfer of the group of counters towards the left of the dial, and the relocation of the date aperture to 3 o’clock.
This 1993 Tudor Chrono Ref. 79180 is a true collector's piece and is in stunning original condition. The early Tudor Chronograph references are commonly referred to as the Tudor "Big Blocks" as the mid-case size is thicker and heavier than the big brother Rolex Daytona references.
Big Block Chrono
" Reverse Panda" Black W/ White Sub Dials
Tudor Oyster 78360 With 589 End Pieces
CASE & BRACELET
The case of this 1993 Tudor Ref. 79180 chronograph aka "Big Block" has a sharp case and remains in factory unpolished condition with the case chamfers still present and visable. The stainless steel bezel is in excellent vintage condition showing light wear from use. The original 78360 oyster bracelet with 589 end pieces retains 13 links, shows no stretch, and is unpolished like the case of the watch.
DIAL & HANDS
The excellent "Reverse Panda" black dial is in excellent condition. The white subdials also give this watch a stunning contrast on the wrist. The tritium lume dots remain in excellent condition, when inspected under U.V. the 9 o'clock marker shows slight degradation. The hands remain in excellent condition as well, showing no lume loss when inspected under U.V.
Watch comes with original inner and outer boxes. The watch also just received a full service and comes backed by a 1-year warranty on accurate timekeeping and is running at COSC Spec.