Seiko Cal. 4591 - 778

This Spring Drive model from 1975 features a 36mm PVD Black case. It features a Green dial protected by a Sapphire crystal and offers 40m of water resistance. [seikata-wm-6b46ea0abae0]

Also known as: Tuna, Silverwave

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

13.0mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Green

Jewels

25j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1975

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