Seiko Cal. 6631 - 812

The 6631-812 is a sought-after Hand-Winding piece from Seiko's golden era. It features a White dial protected by a Acrylic crystal and offers 180m of water resistance. [seikata-wm-4d0c44e9848c]

Also known as: Arnie

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

40mm

Case Thickness

12.7mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

White

Jewels

27j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1987

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