Seiko Cal. 5640 - 258

This Spring Drive model from 1990 features a 45mm Stainless Steel case. It features a Silver dial protected by a Mineral crystal and offers 180m of water resistance. [seikata-wm-abe1de0e625e]

Also known as: Silverwave, Emperor

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

12.6mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Silver

Jewels

21j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1990

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