Seiko Cal. 4491 - 647

This Spring Drive model from 1977 features a 37mm Gold-Plated case. It features a White dial protected by a Sapphire crystal and offers 100m of water resistance. [seikata-wm-2541a25988d0]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

13.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

100m

Dial Color

White

Jewels

26j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1977

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