Seiko Cal. 4456 - 637

The 4456-637 is a sought-after Spring Drive piece from Seiko's golden era. It features a Navy dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-0ca8af065abf]

Also known as: Silverwave

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

9.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

30m

Dial Color

Navy

Jewels

21j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1991

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