Seiko Cal. 6640 - 621

This Automatic model from 1967 features a 36mm Titanium case. It features a Silver dial protected by a Sapphire crystal and offers 60m of water resistance. [seikata-wm-467ab7fa2dd3]

Also known as: Golden Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

36mm

Case Thickness

10.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

60m

Dial Color

Silver

Jewels

24j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1967

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