Monochrome Watches
An online magazine dedicated to fine watches

New Gradient Editions of the Hamilton Jazzmaster Open Heart 40mm

A refined version of Hamilton’s partly skeletonized watch.

| By Robin Nooy | 2 min read |

If you go through Hamilton’s portfolio and history, you’ll discover more than a few openworked or skeletonized models. One of the most famous ones, as worn by Elvis Presley, is the Ventura collection which comes with both closed and open dials. Hamilton also employs the skeletonization process in the more dressy Jazzmaster range. With various models in the past, including this Jazzmaster Skeleton, it’s a long-running tradition for the brand. Hamilton now presents the latest editions of the Jazzmaster Open Heart, and it’s all about the cool gradient dials. 

The Jazzmaster Open Heart has been in the collection for many years, and now receives a subtle update with three new colour combinations. As its name suggests, the stainless steel case measures 40mm in diameter. At a height of just 11.05mm it remains a relatively slim watch, one that is easily worn by pretty much everyone. It features alternating brushed and polished finishing and has a sapphire crystal on both sides. The lugs have a subtle profile to them, giving a more modern touch to the Jazzmaster Open Heart 40mm.

Ad – Scroll to continue with article

Hamilton introduces three new dial variations, with subtle upgrades here and there. The dial now comes in dark blue, deep green with a gradient effect or a silver-white tone. All dials feature the signature Jazzmaster Open Heart cutout on the dial, partly revealing the watch’s beating heart underneath. The refined markers around the dial, and the hands for that matter, are either nickeled or finished in blue for a touch of contrast. The central hour and minutes hand feature a Super-LumiNova insert. The finishing touch is a minute track on the outside edge and the brand’s logo at 9 o’clock.

Powering the new Hamilton Jazzmaster Open Heart 40mm is the H-10 automatic movement, which is Hamilton’s version of Swatch Group’s Powermatic 80 series of movements. We’ve seen this movement in multiple watches by Hamilton before, so nothing groundbreaking here. This modern calibre benefits from a non-magnetic Nivachron balance spring and a power reserve of no less than 80 hours. It runs at a frequency of 21,600vph and can be seen through the sapphire crystal caseback.

The new Hamilton Jazzmaster Open Heart 40mm comes on either a dark brown or dark blue leather strap with a patinated finish. The alternative is a stainless steel bracelet with a folding clasp. With six references in total, the watch is priced at EUR 945 on leather, or EUR 995 on the bracelet which seems like a very fair mark-up.

For more information, please visit

Leave a Reply