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Seiko
Seiko's legendary budget automatic caliber that powered the original Seiko 5 line and SKX diver series for decades. Lacking hacking and hand-winding, it is mechanically simple with just 21 jewels, but this simplicity contributed to its remarkable durability and low maintenance requirements. Now discontinued in favor of the NH35/4R35, the 7S26 remains one of the most iconic and beloved movements in affordable horology.
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Seiko on the secondhand market
+10.3%
2026 so far · +6.0% to +16.9% · 91 matched watches
In line with the index
Year-by-year readings →The Seiko SNKP21J1 is an automatic watch, with a 42mm stainless steel case, powered by the Seiko 7S26 movement and a 41-hour power reserve. Water resistance is rated to 50m, under a hardlex crystal. Manufacturer MSRP is $191.
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