Seiko Cal. 6637 - 774

Seiko 6637-774

This Quartz model from 1971 features a 42mm Stainless Steel case. Powered by the 6637 caliber with 32j jewels beating at 28,800 bph, it delivers a 49 hours power reserve. [seikata-wm-7a57125fa30e]

Also known as: Turtle, UFO

Specifications

Movement
Quartz
Case Material
Stainless Steel
Case Width
42mm
Case Thickness
14.1mm
Lug Width
20mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
70m
Dial Color
Cream
Jewels
32j
Frequency
28,800 bph
Power Reserve
49 hours
Year
1971

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