Seiko Cal. 5645 - 831

The 5645-831 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5645 caliber with 18j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-d57f422d6905]

Also known as: Helmet, Flighty

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

10.5mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

200m

Dial Color

Burgundy

Jewels

18j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1992

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