Seiko has introduced eight fresh additions to its Selection lineup in Japan, and they’re designed to appeal to anyone who loves a classic three-hand watch with a little mechanical drama. Each new model is an “open heart” automatic, meaning there’s a cut-out window on the dial at the 9 o’clock position that lets you watch the movement in action as the watch runs.
The release includes two distinct size groups, making it easier to find a fit that suits different wrist sizes and style preferences.
Four larger Seiko Selection open heart models are on the way:
HFB001 with a silver dial and silver bezel
HFB002 with a blue dial and silver bezel
HFB003 with a black dial and silver bezel
HFB004 with a silver dial paired with a gold bezel
These larger versions use a stainless steel case in a silver tone and measure 40.0 x 11.8 x 46.2 mm, giving them a modern, everyday-wearable presence without looking oversized.
Seiko is also rolling out four smaller open heart models:
HFB007 with a silver dial and silver bezel
HFB008 with a black dial and silver bezel
HFB009 with a silver dial and gold bezel
HFB010 with a pink dial and pink bezel
Like the larger watches, the smaller ones also come in a silver-colored metal case, but with a more compact profile at 33.7 x 10.8 x 39.6 mm—an option that should work well for slimmer wrists or anyone who prefers a more understated case size.
Across all eight watches, Seiko is using the 4R38 automatic caliber. It offers an approximate 41-hour power reserve, and Seiko lists accuracy expectations in the range of -35 to +45 seconds per day. For shoppers specifically seeking an automatic open heart watch with a recognizable Japanese movement, that combination of visible mechanics and accessible everyday specs is a big part of the appeal.
Release timing is still unclear, including exactly when these Seiko Selection open heart watches will go on sale in Japan and whether they’ll eventually launch in other regions such as the United States. For now, fans outside Japan may have to wait for international availability updates or explore existing open heart models already on the market.
