Seiko Cal. 4461 - 278

The Seiko 4461-278 represents an important milestone in Seiko's 1965 lineup. Powered by the 4461 caliber with 28j jewels beating at 28,800 bph, it delivers a 57 hours power reserve. [seikata-wm-5cc5ce56f7ca]

Also known as: Helmet

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

15.7mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Navy

Jewels

28j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1965

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