Seiko Cal. 5631 - 525

Released in 1970, the Cal. 5631 with design code 525 was part of Seiko's domestic market collection. It features a Cream dial protected by a Acrylic crystal and offers 100m of water resistance. [seikata-wm-a16fd0d8b325]

Also known as: UFO, Silverwave

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

39mm

Case Thickness

11.8mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Cream

Jewels

35j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1970

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