Seiko caliber

Seiko 9S6

Sourced specifications: manual winding and 72-hour power reserve. Watchfari lists 29 references using the Seiko 9S6, spread across 1 brand and 4 families. Sourced case diameters run from 36 mm to 42 mm. By movement type: 15 manual and 13 automatic. The most common sourced case material is stainless steel (21 of 22).