Seiko Cal. 5661 - 568

This Spring Drive model from 1971 features a 42mm Stainless Steel case. It features a Navy dial protected by a Hardlex crystal and offers 90m of water resistance. [seikata-wm-215fcc313acd]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

8.1mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Navy

Jewels

25j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1971

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