Seiko Cal. 4422 - 688

The 4422-688 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4422 caliber with 32j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-23a79051c290]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

38mm

Case Thickness

10.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Green

Jewels

32j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1971

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