Seiko Cal. 5613 - 746

The 5613-746 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5613 caliber with 28j jewels beating at 28,800 bph, it delivers a 55 hours power reserve. [seikata-wm-69ae9c1c55a2]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

12.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Navy

Jewels

28j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1979

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