Seiko Cal. 4487 - 136

This Spring Drive model from 1990 features a 41mm Hardlex-Coated Steel case. It features a Black dial protected by a Acrylic crystal and offers 190m of water resistance. [seikata-wm-16c2a2a7a323]

Also known as: Tuna, Panda

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

8.0mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

190m

Dial Color

Black

Jewels

22j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1990

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