At BaselWorld 2011, Seiko introduced a whole range of watches. Of specific interest, at least for this post, is their 4R39 Caliber as showcased in their automatic with 24 hr indicator (SSA021J1). What immediately jumps out, aside from that 24-hour indicator, is the “open heart” on the dial.
Why is this interesting? It allows you to see the mechanical movement (at least, part of it) ticking away, without having to turn the watch over and/or open the case. Certainly, there are plenty of skeleton watches that allow that as well, but I tend to find those more difficult to read than anything.
- Stainless steel case and band (also available with a leather strap)
- Sapphire crystal
- Water resistant to 100m
- Approximately 41 hour power reserve
- 4R39 Caliber movement: 21,600 bph, 24 jewels, automatic
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