Seiko Cal. 5648 - 916

This Spring Drive model from 1986 features a 40mm Hardlex-Coated Steel case. It features a Blue Sunburst dial protected by a Mineral crystal and offers 80m of water resistance. [seikata-wm-b2a064308856]

Also known as: Monster, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

15.4mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1986

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