Rarity, complexity and condition make all the difference when looking for a luxury watch. But while there are major gains to be made, it takes a good eye to know the difference between a clever investment, and a waste of time.

"I think it’s important that you buy a watch which is in very good condition and is totally original, even if it’s a $2,000 watch. Quality is a key issue in this business, approximation is definitely forbidden."

He advised to look at the brand; even with contemporary watches, a good, established name will hold its value.

Paramico also gave his hint for a smart watch investment. For $5,000, he said a rose gold 1940 Patek Philippe with a square case is a good bet for the future.