Seiko Cal. 4550 - 397

The Seiko 4550-397 represents an important milestone in Seiko's 1987 lineup. Powered by the 4550 caliber with 36j jewels beating at 28,800 bph, it delivers a 45 hours power reserve. [seikata-wm-4b9d7fd1e4ae]

Also known as: Bullhead, Rally

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

11.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Burgundy

Jewels

36j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1987

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