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Tissot Seastar 1000 T120.217.11.061.00 Watch
The Tissot Seastar 1000 T120.217.11.061.00 is a dive watch from the Seastar 1000 collection, Tissot's line that translates the Swiss brand's heritage in dive watches into an everyday format. In this reference, the collection is expressed in a 38 mm case: a contained size that maintains the performance of a professional diver (300 m, unidirectional bezel, screw-down crown and pushers) in a format suited to medium wrists. It is Tissot's proposal for those seeking a dive watch with chronograph function, without renouncing the legibility and watertightness that define the collection.
The case is 316L stainless steel, 38 mm in diameter and 12.95 mm thick, with a screw-down case back and screw-down crown. The crystal is sapphire with double-sided anti-reflective coating, and water resistance is 30 bar (300 metres). The bezel is unidirectional, steel with a mineral insert, and the chronograph pushers are screw-down. The gradient grey dial features indices and hands with Super-LumiNova for reading in low light. The movement is Swiss quartz, with hour, date, 30-minute chronograph with 1/10 second, and EOL function (end-of-life battery indicator). The bracelet is stainless steel, with a deployment clasp with push buttons and a quick-release system. The lug width is 18 mm.
The unidirectional bezel is the feature that defines this Seastar. It turns with the thumb and only in one direction, so an accidental turn cannot lengthen the measured dive time. The screw-down crown and screw-down pushers add a second safety gesture: they must be unscrewed before being operated, which prevents accidental presses underwater. The 38 mm case and 12.95 mm thickness keep the ensemble in a contained profile, and the contrast with the 42-44 mm divers common on the market is what makes this Seastar a piece suited to medium wrists without renouncing the 300 m watertightness.
Chronograph Swiss Quartz 300 m Unidirectional Bezel 38 mm Sapphire Super-LumiNova Screw-down Crown
Why choose this watch?
Swiss quartz chronograph with 1/10 second
The Swiss quartz movement offers a chronograph with a 30-minute counter and 1/10 second precision, plus ADD and SPLIT functions. It is quartz precision in a dive watch, without renouncing the legibility of a diver.
300 m and screw-down crown: diver watertightness
The 30 bar (300 m) water resistance and the screw-down crown place this Seastar in the territory of dive watches, not surface sports watches. The pushers are also screw-down, which prevents accidental operation underwater.
Unidirectional bezel with mineral insert
The bezel turns in one direction only and returns to its position with the thumb, allowing elapsed times to be measured without risk of turning it by mistake. It is the classic gesture of a dive watch, applied to everyday life.
38 mm and 12.95 mm: a contained diver
Compared to the usual 42-44 mm divers, the 38 mm of this Seastar place it in a contained format, suited to medium wrists. The case maintains the watertightness and functions of a diver, in a size that does not protrude.
Frequently asked questions
What is the difference between T120.217.11.061.00 and T1202171106100?
None. They are the same reference written in two ways: with dots (T120.217.11.061.00) and without dots (T1202171106100). The dotted form is the one Tissot uses on its official website; the undotted form is the one that appears in some dealers and in searches. The watch is identical.
Can it be used for diving?
Yes. Water resistance is 30 bar (300 m), the bezel is unidirectional and the crown and pushers are screw-down. It is a dive watch with immersion performance, not just a surface sports watch. For professional diving, the use limitations indicated in the Tissot manual should be checked.
Can the bracelet be changed for a strap?
Yes. The steel bracelet incorporates a quick-release system that allows it to be removed without tools. The lug width is 18 mm, so an 18 mm strap with a standard spring bar will fit without adapters. Tissot offers interchangeable straps for this collection.
What is the difference between the 38 mm Seastar 1000 and the 40 mm one?
The main difference is the case size: 38 mm versus 40 mm. The 38 mm is more contained and adapts better to medium or small wrists. The performance (water resistance, bezel, crystal) is equivalent within the Seastar 1000 collection. The choice depends on the wrist and the size preference.
