Seiko Cal. 4537 - 590

This Hand-Winding model from 1991 features a 45mm Two-Tone case. With its 21mm lug width and 10.1mm profile, it sits comfortably on most wrists. [seikata-wm-d47f54e5b292]

Also known as: Shogun, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

45mm

Case Thickness

10.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

50m

Dial Color

White

Jewels

28j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1991

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