Seiko Cal. 5661 - 278

The Seiko 5661-278 represents an important milestone in Seiko's 1973 lineup. It features a Blue Sunburst dial protected by a Sapphire crystal and offers 100m of water resistance. [seikata-wm-355d75417c29]

Also known as: Samurai

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

12.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

33j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1973

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