Seiko Cal. 5694 - 661

Released in 1983, the Cal. 5694 with design code 661 was part of Seiko's domestic market collection. The Bidirectional bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-66bcaa4ac3ec]

Also known as: Sumo, Helmet

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

13.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1983

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