Seiko Cal. 6631 - 300

The 6631-300 is a sought-after Quartz piece from Seiko's golden era. It features a Champagne dial protected by a Mineral crystal and offers 180m of water resistance. [seikata-wm-6fa659d3c592]

Also known as: Monster

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

44mm

Case Thickness

9.3mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Champagne

Jewels

33j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1981

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