Seiko Cal. 4457 - 944

The Seiko 4457-944 represents an important milestone in Seiko's 1972 lineup. Powered by the 4457 caliber with 23j jewels beating at 28,800 bph, it delivers a 53 hours power reserve. [seikata-wm-b73ede9cf51d]

Also known as: Bullhead, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

35mm

Case Thickness

9.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

White

Jewels

23j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1972

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