Seiko Cal. 5640 - 235

This Hand-Winding model from 1981 features a 45mm Two-Tone case. It features a Burgundy dial protected by a Mineral crystal and offers 120m of water resistance. [seikata-wm-47e511906c12]

Also known as: Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

45mm

Case Thickness

8.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Burgundy

Jewels

18j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1981

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