Seiko Cal. 5681 - 988

Released in 1967, the Cal. 5681 with design code 988 was part of Seiko's domestic market collection. With its 22mm lug width and 15.5mm profile, it sits comfortably on most wrists. [seikata-wm-ed8223ccf3ef]

Also known as: Helmet, Silverwave

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

15.5mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Cream

Jewels

21j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1967

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