Seiko Cal. 5631 - 521

Released in 1971, the Cal. 5631 with design code 521 was part of Seiko's domestic market collection. It features a Champagne dial protected by a Mineral crystal and offers 150m of water resistance. [seikata-wm-ba964706bb24]

Also known as: Samurai, Shogun

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

43mm

Case Thickness

8.8mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Champagne

Jewels

17j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1971

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