Seiko Cal. 6630 - 537

This Solar model from 1967 features a 37mm PVD Black case. Powered by the 6630 caliber with 24j jewels beating at 28,800 bph, it delivers a 59 hours power reserve. [seikata-wm-79f56888261f]

Also known as: Sumo, Rally

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

37mm

Case Thickness

15.3mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Navy

Jewels

24j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1967

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