Seiko Cal. 5640 - 421

Released in 1989, the Cal. 5640 with design code 421 was part of Seiko's domestic market collection. It features a Silver dial protected by a Acrylic crystal and offers 30m of water resistance. [seikata-wm-9598d8062186]

Also known as: Goldfeather, Emperor

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

40mm

Case Thickness

8.6mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

30m

Dial Color

Silver

Jewels

35j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1989

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