Seiko Cal. 5637 - 578

This Hand-Winding model from 1980 features a 40mm Two-Tone case. It features a White dial protected by a Mineral crystal and offers 200m of water resistance. [seikata-wm-d804ec4981aa]

Also known as: Monster

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

40mm

Case Thickness

15.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

200m

Dial Color

White

Jewels

23j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1980

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