Seiko Cal. 5634 - 985

Seiko 5634-985

The 5634-985 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5634 caliber with 18j jewels beating at 21,600 bph, it delivers a 66 hours power reserve. [seikata-wm-df4051a8e6c7]

Also known as: Helmet, Golden Tuna

Specifications

Movement
Spring Drive
Case Material
Two-Tone
Case Width
41mm
Case Thickness
13.4mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
120m
Dial Color
Green
Jewels
18j
Frequency
21,600 bph
Power Reserve
66 hours
Year
1997

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