Seiko Cal. 5640 - 297

Released in 1973, the Cal. 5640 with design code 297 was part of Seiko's domestic market collection. It features a Navy dial protected by a Acrylic crystal and offers 120m of water resistance. [seikata-wm-7ad1555ead48]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

12.2mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Navy

Jewels

28j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1973

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