Seiko Cal. 6631 - 221

The 6631-221 is a sought-after Quartz piece from Seiko's golden era. It features a Burgundy dial protected by a Hardlex crystal and offers 70m of water resistance. [seikata-wm-40b3dae6a7c0]

Also known as: Bellmatic, Baby Tuna

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

43mm

Case Thickness

15.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

70m

Dial Color

Burgundy

Jewels

32j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1974

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