Seiko Cal. 7028 - 557

The Seiko 7028-557 represents an important milestone in Seiko's 1999 lineup. Powered by the 7028 caliber with 36j jewels beating at 28,800 bph, it delivers a 54 hours power reserve. [seikata-wm-a6d2c7ccf616]

Also known as: Sportsmatic, Baby Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

15.9mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Silver

Jewels

36j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1999

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