Seiko Cal. 6647 - 978

The Seiko 6647-978 represents an important milestone in Seiko's 1976 lineup. It features a Burgundy dial protected by a Sapphire crystal and offers 60m of water resistance. [seikata-wm-05c25e698068]

Also known as: Sumo

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

37mm

Case Thickness

13.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Burgundy

Jewels

32j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1976

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