Seiko Cal. 5663 - 940

Released in 1975, the Cal. 5663 with design code 940 was part of Seiko's domestic market collection. With its 18mm lug width and 9.8mm profile, it sits comfortably on most wrists. [seikata-wm-327df51778fc]

Also known as: Sumo, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

34mm

Case Thickness

9.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Cream

Jewels

17j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1975

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