Seiko Cal. 5665 - 840

The Seiko 5665-840 represents an important milestone in Seiko's 1975 lineup. It features a Burgundy dial protected by a Hardlex crystal and offers 190m of water resistance. [seikata-wm-c0c6dc812732]

Also known as: UFO, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

10.4mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Burgundy

Jewels

36j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1975

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