Seiko Cal. 6631 - 923

The 6631-923 is a sought-after Quartz piece from Seiko's golden era. It features a White dial protected by a Mineral crystal and offers 190m of water resistance. [seikata-wm-58ac7b202d64]

Also known as: Golden Tuna

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

44mm

Case Thickness

13.1mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

White

Jewels

35j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1973

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