Seiko Cal. 6631 - 308

Seiko 6631-308

The 6631-308 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Cream dial protected by a Sapphire crystal and offers 80m of water resistance. [seikata-wm-ff65667c7b2e]

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
37mm
Case Thickness
8.9mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
80m
Dial Color
Cream
Jewels
30j
Frequency
28,800 bph
Power Reserve
41 hours
Year
1978

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