Seiko Cal. 5644 - 847

This Spring Drive model from 1965 features a 39mm Titanium case. It features a Navy dial protected by a Hardlex crystal and offers 150m of water resistance. [seikata-wm-f8fdad44e3b4]

Also known as: Baby Tuna, Arnie

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

8.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Navy

Jewels

27j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1965

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