Seiko Cal. 6648 - 631

Seiko 6648-631

This Quartz model from 1978 features a 37mm Two-Tone case. With its 21mm lug width and 10.7mm profile, it sits comfortably on most wrists. [seikata-wm-4e48f32a6bc7]

Also known as: Monster, Arnie

Specifications

Movement
Quartz
Case Material
Two-Tone
Case Width
37mm
Case Thickness
10.7mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
170m
Dial Color
Green
Jewels
18j
Frequency
21,600 bph
Power Reserve
51 hours
Year
1978

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