Seiko Cal. 6613 - 991

The 6613-991 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6613 caliber with 17j jewels beating at 36,000 bph, it delivers a 47 hours power reserve. [seikata-wm-114075713ada]

Also known as: Sumo, Helmet

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

12.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

50m

Dial Color

Black

Jewels

17j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1976

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