Seiko Cal. 5638 - 745

Seiko 5638-745

The 5638-745 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5638 caliber with 31j jewels beating at 21,600 bph, it delivers a 40 hours power reserve. [seikata-wm-261274f3fef7]

Also known as: Monster, Shogun

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
41mm
Case Thickness
10.4mm
Lug Width
19mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
70m
Dial Color
Cream
Jewels
31j
Frequency
21,600 bph
Power Reserve
40 hours
Year
1994

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