Seiko Cal. 6613 - 613

The 6613-613 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6613 caliber with 21j jewels beating at 21,600 bph, it delivers a 46 hours power reserve. [seikata-wm-643580d48138]

Also known as: Bellmatic, Baby Tuna

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

8.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

170m

Dial Color

Green

Jewels

21j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1976

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