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Round blue-dial chronograph watch on a stainless steel bracelet with unidirectional bezel and deployment clasp

Tissot

Tissot Seastar 1000 Chronograph Quartz T120.417.11.041.01 300M Watch

SKU CH-Q7BW-CWNBC

A stainless-steel chronograph diver rated to 300 metres with a sapphire crystal, unidirectional bezel, ETA G10.212 quartz movement and blue dial

  • Watch movementQuartz
  • Product shapeRound
  • Watch face colorBlue
  • Dial markingsDotted Markers
  • Display typeAnalog
  • Date displayDate
  • Professional diver rating with 300m water resistance
  • Scratch-resistant sapphire crystal protects the blue dial
  • Reliable Swiss quartz chronograph calibre ETA G10.212
  • Robust stainless steel case and bracelet with deployment clasp
  • Unidirectional bezel times dives safely and accurately

Diver's watch rated to 300 m

The Tissot Seastar 1000 is a quartz chronograph built for professional diving. Its stainless steel case and bracelet resist corrosion at depth. The unidirectional bezel tracks elapsed time underwater. A sapphire crystal protects the blue dial with dotted markers and a date window.

Caliber ETA G10.212 chronograph

The quartz movement powers central stopwatch seconds, 30-minute and 1/10-second sub-dials, plus a date display. Sapphire crystal adds scratch resistance that mineral glass cannot match. The deployment clasp secures the bracelet during high-pressure activity. No additional software or accessories alter these functions.

45 mm case fits most wrists

The 45.00 mm stainless steel case slides under standard cuffs. Quartz operation removes the need for daily winding or time-setting adjustments. Installation is limited to bracelet sizing by a watchmaker. The only common issue is forgetting to screw the crown down before immersion, which compromises the 300 m seal.

How it compares

Measured against everything we stock in Analog & Digital Wristwatches, at today’s prices. Recalculated every night.

Price $548.99
Pricier than about 90% of the 2,679 comparable items (median $130.99).

Specifications

Product
Brand nameTissot
Design styleSports
Watch face colorBlue
Item conditionNew
Display
Display typeAnalog
Size & build
Main materialStainless Steel
Product shapeRound
Strap materialStainless Steel
Closure typeDeployment Clasp
Bezel typeUnidirectional Bezel
Housing materialStainless Steel
Case size45 mm
Watch glassSapphire
Environment & compliance
Water resistance300m
More details
Watch movementQuartz
Dial markingsDotted Markers
Date displayDate
Suitable forMale

Questions about this item

How often will the ETA G10.212 quartz movement need a battery replacement?

Quartz movements typically require a battery change every two to three years; a watchmaker can swap it and re‑check the 300 m water resistance at the same time.

What is the first limit reached during prolonged wear of the 45.00 mm stainless‑steel case?

The 45.00 mm case diameter may feel bulky on smaller wrists before any technical limit of the chronograph or water resistance is reached.

Does the sapphire crystal and 300 m rating add noticeable heat or weight during all‑day use?

The sapphire crystal and 300 m water resistance add minimal weight and no perceptible heat; the watch remains comfortable for continuous daily wear.

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