Seiko Cal. 5668 - 221

The 5668-221 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5668 caliber with 25j jewels beating at 28,800 bph, it delivers a 43 hours power reserve. [seikata-wm-699c3de13640]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

8.7mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

180m

Dial Color

Green

Jewels

25j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1971

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