Seiko Cal. 5638 - 998

Seiko 5638-998

The 5638-998 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5638 caliber with 18j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-7f538cd1b48d]

Specifications

Movement
Automatic
Case Material
Gold-Plated
Case Width
43mm
Case Thickness
11.8mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
30m
Dial Color
Black
Jewels
18j
Frequency
21,600 bph
Power Reserve
55 hours
Year
1969

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