Seiko Cal. 5640 - 976

Seiko 5640-976

The 5640-976 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5640 caliber with 17j jewels beating at 28,800 bph, it delivers a 37 hours power reserve. [seikata-wm-c5eda0297729]

Also known as: Golden Tuna

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
34mm
Case Thickness
13.0mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
40m
Dial Color
Blue Sunburst
Jewels
17j
Frequency
28,800 bph
Power Reserve
37 hours
Year
1988

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seikata-wm-c5eda0297729