Seiko Cal. 6631 - 693

Seiko 6631-693

The 6631-693 is a sought-after Quartz piece from Seiko's golden era. It features a White dial protected by a Mineral crystal and offers 80m of water resistance. [seikata-wm-d4d66f593a53]

Also known as: Monster

Specifications

Movement
Quartz
Case Material
Hardlex-Coated Steel
Case Width
40mm
Case Thickness
9.6mm
Lug Width
19mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
80m
Dial Color
White
Jewels
26j
Frequency
28,800 bph
Power Reserve
55 hours
Year
1976

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