Seiko Cal. 6613 - 631

The 6613-631 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6613 caliber with 21j jewels beating at 28,800 bph, it delivers a 59 hours power reserve. [seikata-wm-d04003f069eb]

Also known as: Turtle, Arnie

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

45mm

Case Thickness

9.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

100m

Dial Color

Champagne

Jewels

21j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1987

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