Seiko Cal. 4487 - 551

This Spring Drive model from 1993 features a 39mm Gold-Plated case. It features a Navy dial protected by a Acrylic crystal and offers 180m of water resistance. [seikata-wm-46503c0112f5]

Also known as: Tuna, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

12.1mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Navy

Jewels

22j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1993

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