Seiko Cal. 5631 - 896

The 5631-896 is a sought-after Automatic piece from Seiko's golden era. It features a Burgundy dial protected by a Mineral crystal and offers 90m of water resistance. [seikata-wm-4ab7fe309209]

Also known as: Baby Tuna, Arnie

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

8.0mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Burgundy

Jewels

20j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1975

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