Seiko Cal. 6613 - 647

This Solar model from 1970 features a 37mm Titanium case. Powered by the 6613 caliber with 33j jewels beating at 28,800 bph, it delivers a 43 hours power reserve. [seikata-wm-cb15741de9aa]

Also known as: Helmet, UFO

Specifications

Movement

Solar

Case Material

Titanium

Case Width

37mm

Case Thickness

9.3mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

200m

Dial Color

Green

Jewels

33j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1970

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