This number is engraved on the back of your timepiece's case, often beneath the TAG logo.

In a nutshell, while the vast majority of TAG Heuer watches do not hold value in comparison to the big luxury brands like Rolex and Patek Philippe, its rare or vintage pieces do hold excellent resale value and fare better in terms of value.

Rarity and exclusivity often serve as catalysts for appreciation in value. Limited edition releases, discontinued models, and special variants inject TAG Heuer watches with a sense of exclusivity and scarcity, fuelling collector interest and driving up prices in the second-hand TAG Heuer market.