Seiko Cal. 4540 - 975

This Hand-Winding model from 1982 features a 46mm Stainless Steel case. It features a White dial protected by a Acrylic crystal and offers 30m of water resistance. [seikata-wm-770467cd9473]

Also known as: Sumo, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

14.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

30m

Dial Color

White

Jewels

21j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1982

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