Seiko Cal. 5640 - 288

Released in 1978, the Cal. 5640 with design code 288 was part of Seiko's domestic market collection. It features a Black dial protected by a Acrylic crystal and offers 110m of water resistance. [seikata-wm-ca5d54e63319]

Also known as: UFO, Silverwave

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

43mm

Case Thickness

10.2mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Black

Jewels

22j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1978

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