Seiko Cal. 6663 - 790

The Seiko 6663-790 represents an important milestone in Seiko's 1968 lineup. It features a Burgundy dial protected by a Mineral crystal and offers 70m of water resistance. [seikata-wm-3cf32f628f19]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

34mm

Case Thickness

9.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Burgundy

Jewels

24j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1968

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