Seiko Cal. 5610 - 657

The Seiko 5610-657 represents an important milestone in Seiko's 1966 lineup. It features a Green dial protected by a Acrylic crystal and offers 200m of water resistance. [seikata-wm-90dd20236f06]

Also known as: Sumo, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

45mm

Case Thickness

10.7mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

200m

Dial Color

Green

Jewels

24j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1966

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