Tissot is a Swiss watchmaker founded in 1853, currently a member of the Swatch Group. The brand occupies a well-regarded position in the Swiss watch hierarchy, offering a range of mechanical and quartz timepieces that are often considered excellent value for Swiss-made quality. Tissot watches feature various markings on their case backs, dials, and movements that reflect the brand's long heritage and Swiss manufacturing standards. Understanding these markings can be valuable for dating and authenticating Tissot timepieces, especially vintage models.
Tissot Watch Markings & Identification Guide
Tissot watches
Common Models
Tissot PRXTissot GentlemanTissot SeastarTissot Le LocleTissot VisodateTissot Chemin des Tourelles
Serial Number Information
Tissot serial numbers are typically found engraved on the case back and can often provide information about the production date, particularly on vintage models. For many Tissot watches produced during the 20th century, the serial number follows a sequential system that can be cross-referenced with serial number tables compiled by collectors and historical researchers. These tables, while not always perfectly complete, can often narrow down the production date to within a few years.
The case back of a Tissot watch often displays additional reference numbers beyond the serial, including the case reference and caliber number. The caliber number identifies the movement, which for vintage Tissot models may be a proprietary caliber, while modern models commonly use ETA movements (also owned by the Swatch Group). The case reference can sometimes be used to identify the specific model line and variant.
Modern Tissot watches typically include a comprehensive reference number on the case back that encodes information about the model line, movement type, case material, dial color, and strap type. This reference number, often in a format like 'T137.407.11.041.00', can be looked up on Tissot's website or through authorized dealers. For vintage models without clear reference numbers, collector communities and Tissot's historical archives (the brand maintains a museum in Le Locle, Switzerland) may be valuable resources.
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What to Check Next
Common Markings Found on Tissot Watches
Serial Number Engraving
A unique alphanumeric code engraved on the case back that identifies your individual watch. This number is typically used for warranty registration, service history, and authentication.
Water Resistance Rating (Case Back)A marking indicating the watch's tested water resistance depth, typically shown in meters, feet, bar, or ATM. This rating describes laboratory test conditions, not actual diving depth recommendations.
Case Material MarkingAn engraving or stamp indicating the material the watch case is made from, such as stainless steel, titanium, or gold. This marking helps verify authenticity and informs care and maintenance decisions.
Clasp Code StampAn alphanumeric code stamped on the bracelet clasp identifying the clasp model and sometimes the production date. This code helps identify replacement clasps and can aid in dating the bracelet.
Bracelet End Link NumberA number stamped on the end links of a bracelet identifying their specific shape and size. This number is critical for finding replacement end links that properly fit your watch case.
Deployment Clasp MarkingMarkings found on a deployment (deployant) clasp that identify the clasp type, size, and brand. These help determine compatibility when replacing or servicing the clasp mechanism.
Bracelet Model NumberA unique identifier stamped on the bracelet that specifies the exact bracelet model. This number is essential for ordering correct replacement bracelets or links.
Adjustable Clasp IndicatorMarkings or features on a clasp indicating it has micro-adjustment or on-the-fly sizing capability. This allows fine-tuning of bracelet fit without tools.
Case Reference NumberA manufacturer-assigned reference number identifying the specific watch case design, dimensions, and material. This is the primary identifier for sourcing correct case parts and compatible accessories.
Lug Width MarkingA number stamped between or on the lugs indicating the distance between them in millimeters. This measurement determines which strap or bracelet width fits your watch.
Bezel Insert CodeA code identifying the specific bezel insert installed on a watch, typically relevant for dive watches and GMT models. This number is essential for sourcing correct replacement inserts.
Crown Logo StampA brand logo or emblem stamped or engraved on the watch crown. This identifies the manufacturer and can indicate whether the crown is an original or replacement part.
Case Size IndicatorA marking indicating the watch case diameter or dimensions, typically in millimeters. This helps identify the watch model variant and determine strap compatibility.
Caliber NumberA manufacturer's identifier for the specific movement (mechanism) inside the watch. This number reveals the movement type, features, accuracy, and service requirements.
Jewel Count MarkingA marking indicating the number of jewels (synthetic rubies) used as bearings in the movement. This number reflects movement complexity but is not a direct indicator of quality.
Movement Country of OriginA marking indicating where the watch movement was manufactured, such as "Swiss" or "Japan." This identifies the movement's origin, which often influences perceived quality and value.
Regulation MarkingMarkings on or near the movement's regulator indicating adjustment positions for timing accuracy. These are used by watchmakers to fine-tune the watch's rate.
Shock Protection SymbolA marking indicating the movement incorporates a shock protection system for the balance wheel. Common systems include Incabloc, Diashock, and Parashock.
WR 100M / 10 Bar MarkingA water resistance rating of 100 meters (10 bar/ATM), generally considered suitable for swimming and recreational water activities. Not rated for scuba diving or high-impact water sports.
Bar / ATM Pressure RatingA water resistance rating expressed in bar or ATM (atmospheres) instead of meters. One bar/ATM approximately equals 10 meters of water depth in testing pressure.
Swiss Made LabelA legally protected designation indicating the watch meets Swiss origin requirements for movement, assembly, and quality inspection. "Swiss Made" is one of the most recognized quality marks in watchmaking.
German Made MarkingA marking indicating the watch was manufactured in Germany, typically associated with brands from the Glashutte or Pforzheim watchmaking regions. German watches are known for Bauhaus design and engineering precision.
PSC Diamond Safety MarkA small diamond-shaped symbol required on consumer products sold in Japan under the Product Safety of Consumer Products Act. On watches, it confirms compliance with Japanese electrical and safety standards.
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Frequently asked questions
How can I find the production date of my Tissot watch using the serial number?
Tissot serial numbers, typically found on the case back, can often be cross-referenced with serial number tables compiled by collectors and researchers. These tables map serial number ranges to approximate production years. The accuracy is generally good for 20th-century models, though gaps exist. For modern watches, the full reference number on the case back can identify the model era.
What movements does Tissot use?
Modern Tissot watches commonly use ETA movements, which are produced by another Swatch Group company. Popular movements include the ETA 2824-2 and the Powermatic 80, which offers an extended 80-hour power reserve. Some vintage Tissot watches used proprietary calibers. The specific caliber is typically indicated on the case back.
What does 'SWISS MADE' on my Tissot watch mean?
The 'SWISS MADE' designation indicates that the watch meets specific legal criteria established by Swiss law regarding the origin of the movement, assembly, and final inspection. For a watch to carry this label, the movement must be Swiss, the watch must be assembled in Switzerland, and final inspection must occur in Switzerland. This designation is commonly found on the dial and/or case back.
How can I identify a fake Tissot watch?
Common indicators of counterfeit Tissot watches often include poor printing quality on the dial, inconsistent or incorrect case back markings, low-quality movements that do not match the stated caliber, and substandard overall finishing. Comparing the watch against known genuine examples and checking the reference number against Tissot's official catalog can help identify fakes. Professional authentication is commonly recommended for high-value purchases.
What is the Tissot PRX and how do I identify the model variants?
The Tissot PRX is a retro-inspired model reintroduced in recent years, available in quartz and automatic variants. The model can typically be identified by its integrated bracelet design and the reference number on the case back. Quartz versions commonly use a three-hand ETA quartz movement, while automatic versions typically use the Powermatic 80 caliber.
Does Tissot have a heritage or museum archive for identifying old watches?
Tissot maintains a museum and historical archive at their headquarters in Le Locle, Switzerland. While direct access to the archive for individual watch dating may be limited, the brand has occasionally assisted collectors with historical inquiries. Authorized Tissot service centers may also be able to look up information based on serial and reference numbers.
What does the '+' symbol in Tissot branding represent?
The '+' symbol is often associated with the Swiss cross and is used as part of Tissot's branding to emphasize the brand's Swiss heritage. It appears in the Tissot logo and marketing materials. This symbol is one of the brand identifiers that should be correctly rendered on genuine Tissot products.
How water resistant are Tissot Seastar models?
Tissot Seastar models are typically rated for significant water resistance, with many models rated to 300 meters or more, which generally makes them suitable for recreational diving. The specific water resistance rating is commonly found on the case back and dial. As with all water resistant watches, the seals should be checked regularly, and the rating can degrade over time.
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