Seiko Cal. 5640 - 592

The 5640-592 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5640 caliber with 23j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-f7937c7b6228]

Also known as: Golden Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

38mm

Case Thickness

9.5mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

160m

Dial Color

Green

Jewels

23j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1984

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