Seiko Cal. 4540 - 346

This Hand-Winding model from 1982 features a 40mm Hardlex-Coated Steel case. Powered by the 4540 caliber with 28j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-1e05ecb4e657]

Also known as: Sumo, Goldfeather

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

14.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

60m

Dial Color

Silver

Jewels

28j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1982

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