Seiko Cal. 4427 - 254

The Seiko 4427-254 represents an important milestone in Seiko's 1976 lineup. Powered by the 4427 caliber with 29j jewels beating at 36,000 bph, it delivers a 37 hours power reserve. [seikata-wm-e49746700827]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

42mm

Case Thickness

8.7mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Silver

Jewels

29j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1976

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