Seiko Cal. 5640 - 330

The Seiko 5640-330 represents an important milestone in Seiko's 1978 lineup. It features a Silver dial protected by a Mineral crystal and offers 100m of water resistance. [seikata-wm-b59821308fec]

Also known as: UFO, Flighty

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

11.4mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

100m

Dial Color

Silver

Jewels

28j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1978

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