Seiko Cal. 6647 - 926

The 6647-926 is a sought-after Spring Drive piece from Seiko's golden era. It features a Champagne dial protected by a Sapphire crystal and offers 30m of water resistance. [seikata-wm-d808b3fdaca0]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

9.7mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Champagne

Jewels

20j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1965

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