Seiko Cal. 5638 - 983

Seiko 5638-983

The 5638-983 is a sought-after Quartz piece from Seiko's golden era. Powered by the 5638 caliber with 19j jewels beating at 36,000 bph, it delivers a 66 hours power reserve. [seikata-wm-ced8605c2e9c]

Also known as: UFO, Golden Tuna

Specifications

Movement
Quartz
Case Material
Hardlex-Coated Steel
Case Width
35mm
Case Thickness
15.2mm
Lug Width
19mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
140m
Dial Color
Black
Jewels
19j
Frequency
36,000 bph
Power Reserve
66 hours
Year
1983

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