Seiko Cal. 5655 - 637

The Seiko 5655-637 represents an important milestone in Seiko's 1966 lineup. It features a Burgundy dial protected by a Sapphire crystal and offers 60m of water resistance. [seikata-wm-bb8b861630ff]

Also known as: Helmet, UFO

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

37mm

Case Thickness

8.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Burgundy

Jewels

31j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1966

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