Seiko Cal. 5231 - 303

Released in 1968, the Cal. 5231 with design code 303 was part of Seiko's domestic market collection. With its 20mm lug width and 9.0mm profile, it sits comfortably on most wrists. [seikata-wm-09df8bc6f9c0]

Also known as: Samurai, Monster

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

9.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

140m

Dial Color

Black

Jewels

19j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1968

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