Seiko caliber

Seiko 7S26

Sourced specifications: automatic winding, 41-hour power reserve, 21,600 vph, and 21 jewels. Watchfari lists 3 references using the Seiko 7S26, spread across 1 brand and 1 family. Sourced case diameters run from 38 mm to 42.5 mm. Every sourced movement here is automatic. All sourced cases are stainless steel. The sourced production start year is 1996.