Seiko Cal. 5664 - 849

This Spring Drive model from 1987 features a 37mm Hardlex-Coated Steel case. With its 22mm lug width and 10.4mm profile, it sits comfortably on most wrists. [seikata-wm-770146b3ea8a]

Also known as: Monster, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

10.4mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Green

Jewels

32j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1987

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