Tudor 79170 Tudor Oysterdate Chronograph "Big Block" (35132)

35132 Tudor Oysterdate Chronograph 79170 "Big Block", stainless steel case on a stainless steel 78360 Tudor bracelet with 589 endlinks, automatic movement, silver sunbust dial with black sunburst sub-dials and date at 3 o'clock under a cyclops magnifier, chronograph, screw-down Oyster crown and pushers, sapphire crystal, water resistant to 100m/330ft, diameter: 40mm, thickness: 14.5mm. Excellent condition with original box and hang-tag. This watch was completely serviced by Tudor in 2016.


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More about Tudor 79170 Tudor Oysterdate Chronograph "Big Block"

This is a vintage stainless steel Tudor Oysterdate Chronograph "Big Block" 79170. It has a stainless steel 78360 Tudor bracelet with 589 endlinks and a double folding deployment clasp, and a scratch resistant sapphire crystal. It includes a screw down Oyster winding crown with crown guards, screw down round chronograph push buttons, and a solid screw down case back engraved with "ORIGINAL OYSTER CASE BY ROLEX – GENEVA." The 40mm solid three-body case, bracelet, straight lugs, and flat rotating knurled black bezel with graduated 12-hour scale, are polished/brushed. It has the original silver dial with applied faceted steel baton hour markers, and luminous pip indices around a perimeter luminous white minute/chronograph one-fifth second scale. It includes steel baton hands with luminous inserts, a steel center sweep chronograph hand with a luminous white arrow tip, and there is a Cyclops magnification lens over the date at the 3 o'clock position. There are three recessed white subsidiary dials with black markers and Arabic numerals, and steel indicator hands, including a 30-minute chronograph totalizer at 12 o'clock, a running small seconds register at 9 o'clock, and there is a 12-hour chronograph totalizer at 6 o'clock. It's water resistant to 100 meters/330 feet, it has a 40-hour power reserve at full winding, and the 14.5mm thick case, dial, and movement are all signed.

This Tudor Oysterdate Chronograph "Big Block" 79170 has a mechanical automatic self-winding caliber Valjoux 7750 movement. It's rhodium-plated with fausses cotes and Cotes de Geneve embellishment. It's constructed with 25 jewels, a straight-line lever escapement, a monometallic balance, and a shock absorber device. It includes a self-compensating flat balance-spring, an index regulator, and a hacking seconds device for precision time setting. The mechanism oscillates at a frequency of 28,800 vph (4 Hz).

This iteration of the Tudor Oysterdate Chronograph "Big Block" 79170 was introduced in 1992.