Seiko Cal. 5638 - 663

Seiko 5638-663

This Quartz model from 1970 features a 41mm Hardlex-Coated Steel case. Powered by the 5638 caliber with 20j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-a7c5f5b63206]

Specifications

Movement
Quartz
Case Material
Hardlex-Coated Steel
Case Width
41mm
Case Thickness
11.0mm
Lug Width
18mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
190m
Dial Color
Burgundy
Jewels
20j
Frequency
21,600 bph
Power Reserve
53 hours
Year
1970

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seikata-wm-a7c5f5b63206