Seiko Cal. 6644 - 458

The Seiko 6644-458 represents an important milestone in Seiko's 1965 lineup. It features a Navy dial protected by a Hardlex crystal and offers 50m of water resistance. [seikata-wm-9027131f214d]

Also known as: Sumo, Crown

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

14.4mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

50m

Dial Color

Navy

Jewels

28j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1965

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