Seiko Cal. 5690 - 221

The 5690-221 is a sought-after Quartz piece from Seiko's golden era. Powered by the 5690 caliber with 35j jewels beating at 21,600 bph, it delivers a 58 hours power reserve. [seikata-wm-ad4aafc3cf2d]

Also known as: Helmet, UFO

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

34mm

Case Thickness

10.8mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Silver

Jewels

35j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1975

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