Anyone who’s ever bought or contemplated buying a secondhand Rolex watch, here’s some food for thought: If you had purchased ...

Rolex introduced the Batman GMT in 2013. The Pepsi’s 4.1% gain in a year contrasts with a 5.7% loss for an index of Rolex watch prices compiled by Subdial.

In the world of luxury watches, Rolex GMT models like the 126710BLNR “Batman” and 126710BLRO “Pepsi” have long been holiday favorites, and this year they continue to attract attention.

Both watches sell for the same price at retail – about US$10,700 – on the same steel Rolex Oyster bracelet. The divergence shows how a model’s desirability and perceived scarcity can affect prices.