Seiko Cal. 6644 - 663

The Seiko 6644-663 represents an important milestone in Seiko's 1975 lineup. It features a Champagne dial protected by a Sapphire crystal and offers 50m of water resistance. [seikata-wm-dba440216e2a]

Also known as: Rally

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

10.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Champagne

Jewels

26j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1975

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