Seiko Cal. 6647 - 653

The 6647-653 is a sought-after Solar piece from Seiko's golden era. It features a Navy dial protected by a Acrylic crystal and offers 40m of water resistance. [seikata-wm-f9400ac9ef5b]

Also known as: Sumo

Specifications

Movement

Solar

Case Material

Titanium

Case Width

35mm

Case Thickness

13.5mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

40m

Dial Color

Navy

Jewels

18j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1974

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