Seiko Cal. 5661 - 490

The Seiko 5661-490 represents an important milestone in Seiko's 1985 lineup. It features a Black dial protected by a Hardlex crystal and offers 70m of water resistance. [seikata-wm-43868946b110]

Also known as: Sumo, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

45mm

Case Thickness

15.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Black

Jewels

21j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1985

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