Seiko Cal. 5640 - 992

The Seiko 5640-992 represents an important milestone in Seiko's 1984 lineup. It features a Burgundy dial protected by a Acrylic crystal and offers 160m of water resistance. [seikata-wm-760c2c8e5f09]

Also known as: Monster, Flighty

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

14.9mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Burgundy

Jewels

30j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1984

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