This story is part of The Greatest Watches of All Time collection, publishing every day this week. Read the introduction to the series here.
Watches are far too subjective to rank, you say? We did it anyway. For this list of the 50 Greatest Watches of All Time, we identified timepieces with a combination of compelling features, influence and lasting popularity, as well as a few overlooked but exceptional models. Deriving from all watch categories and from the past hundred or so years, this ultimate tally culminates in the single greatest, most perfect watch ever created.
Looking for watches you can actually buy? Check out our stories “The 50 Best Watches for Men” and “The 30 Best Affordable Watches Under $1,000.”
20: Seiko 62MAS

Seiko is renowned today for its dive watches, a story that began in 1965. Basic principles and design elements established with the release of the 62 MAS in that year continue to inform the modern Japanese brand’s highly capable, fun, affordable and deservedly popular dive watch range, as well as more upmarket models.
Diameter: 37mm
Movement: Seiko 6217A automatic
Price: ~$5,500+