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.

The bottom number is your timepiece's unique serial number, while the top is the model reference, which is identical for each watch of the model type. What do the serial and model numbers mean? The two numbers on the back of your TAG Heuer watch have different purposes.