Hamilton Jazzmaster Open Heart Auto 42mm vs Hamilton Jazzmaster Thinline Auto 40mm

In-Depth Comparison

The Hamilton Jazzmaster Open Heart Auto 42mm and the Hamilton Jazzmaster Thinline Auto 40mm represent two compelling options in the luxury watch market. Both timepieces have earned devoted followings among collectors and enthusiasts, but they approach horology from distinctly different perspectives. Let's break down how these two watches compare across the key dimensions that matter most to buyers.

Heritage And Brand Prestige

Hamilton and Hamilton is a brand that needs no introduction. Comparing two models from the same manufacturer comes down to purpose, design philosophy, and intended use case. Both watches hail from Switzerland, benefiting from the region's deep horological tradition. This particular Jazzmaster reference was introduced in 2017, while this Jazzmaster reference debuted in 2018. The Hamilton Jazzmaster Thinline Auto 40mm is the newer release, potentially featuring more modern technology and finishing.

Movement And Mechanics

At the heart of the Hamilton Jazzmaster Open Heart Auto 42mm beats the H-10 caliber offering a 80-hour power reserve running at 21,600 vph with 25 jewels. The Hamilton Jazzmaster Thinline Auto 40mm is powered by the H-10 with a 80-hour power reserve operating at 21,600 vph featuring 25 jewels. Both watches offer identical power reserves, making them equally practical for daily rotation.

Dimensions And Wearability

The Hamilton Jazzmaster Open Heart Auto 42mm features a 42.0mm case at 11.7mm thick with a 50.5mm lug-to-lug measurement, crafted in Stainless Steel. The Hamilton Jazzmaster Thinline Auto 40mm comes in at 40.0mm and 9.4mm thick with 47.5mm lug-to-lug, constructed from Stainless Steel. The Hamilton Jazzmaster Thinline Auto 40mm wears more compactly on the wrist, making it potentially more suitable for smaller wrists or those who prefer understated proportions. At 58g, the Hamilton Jazzmaster Thinline Auto 40mm is the lighter of the two.

Materials And Construction

The Hamilton Jazzmaster Open Heart Auto 42mm uses a Sapphire crystal paired with a Fixed, polished bezel, while the Hamilton Jazzmaster Thinline Auto 40mm features Sapphire crystal with a Fixed, polished bezel. On the wrist, the Hamilton Jazzmaster Open Heart Auto 42mm comes on a Brown calf leather strap with Pin buckle, while the Hamilton Jazzmaster Thinline Auto 40mm is fitted with Black calf leather strap featuring Pin buckle.

Water Resistance And Capability

The Hamilton Jazzmaster Open Heart Auto 42mm is rated to 50m / 164ft and the Hamilton Jazzmaster Thinline Auto 40mm to 50m / 164ft. Both watches share the same water resistance rating, making them equally suited for aquatic activities.

Pricing And Value

At retail, the Hamilton Jazzmaster Open Heart Auto 42mm lists for $1,045 compared to $695 for the Hamilton Jazzmaster Thinline Auto 40mm. On the secondary market, the Hamilton Jazzmaster Open Heart Auto 42mm trades around $795 while the Hamilton Jazzmaster Thinline Auto 40mm commands approximately $545.

The Verdict

Choosing between the Hamilton Jazzmaster Open Heart Auto 42mm and the Hamilton Jazzmaster Thinline Auto 40mm ultimately comes down to personal priorities. For dress occasions and smaller wrists, the Hamilton Jazzmaster Thinline Auto 40mm is more versatile. Both watches are exceptional timepieces that will serve their owner well for generations. We recommend trying both on the wrist at an authorized dealer before making your final decision, as comfort and emotional connection are ultimately just as important as specifications.