Seiko Cal. 5640 - 451

The 5640-451 is a sought-after Quartz piece from Seiko's golden era. It features a Cream dial protected by a Acrylic crystal and offers 130m of water resistance. [seikata-wm-fb232d1c6380]

Also known as: Helmet, Rally

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

46mm

Case Thickness

8.4mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

130m

Dial Color

Cream

Jewels

32j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1988

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