Seiko Cal. 5631 - 232

The 5631-232 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Burgundy dial protected by a Mineral crystal and offers 100m of water resistance. [seikata-wm-e0029ffb9aaa]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

10.7mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

100m

Dial Color

Burgundy

Jewels

28j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1967

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