Seiko Cal. 4596 - 637

This Hand-Winding model from 1965 features a 37mm Two-Tone case. It features a Navy dial protected by a Sapphire crystal and offers 170m of water resistance. [seikata-wm-fcb394450db9]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

37mm

Case Thickness

8.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Navy

Jewels

26j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1965

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