Seiko Cal. 6630 - 564

Seiko 6630-564

This Quartz model from 1970 features a 37mm Hardlex-Coated Steel case. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-3e9f5b9c0cd8]

Also known as: Bullhead, Bellmatic

Specifications

Movement
Quartz
Case Material
Hardlex-Coated Steel
Case Width
37mm
Case Thickness
9.2mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
90m
Dial Color
Silver
Jewels
17j
Frequency
36,000 bph
Power Reserve
38 hours
Year
1970

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