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. Its chronograph mechanism was a highly reliable cam and oscillating pinion system.
The Tudor Big Block was an exciting piece for Tudor as it was the first automatically wound chronograph from the WIlsdorf stable – a full decade ahead of the reference 16520 Rolex Daytona.
Information:
Serial: B,605,XXX
Year: 1995
Case Reference: 79160
Bracelet: 78360 Clasp Code with 589 Endlinks - Stainless Steel
Dial: Matte Reverse Panda - Tritium
Hands: Tritium
Case Size: 40mm x 14.5mm Thickness
Lug Width: 20mm
Case: Stainless Steel
Caliber: Valjoux 7750 - Automatic - Running ( 4 s/d 302 amp)
Functions: Hours, Minutes, Seconds, Date, Chronograph
Accessories: No box or papers - watch only
Crystal: Acrylic
Bracelet size: 7.5”
Condition:
Case has very little normal wear. Bracelet has light normal surface wear with a couple marks on the clasp and minimal stretch. Dial has light wear on the shield. Hands have some deuteriation to the steel with lume intact. Crystal has one mark on the cyclops. Running ( 4 s/d 302 amp).
