Seiko Cal. 6644 - 522

The 6644-522 is a sought-after Quartz piece from Seiko's golden era. It features a Navy dial protected by a Sapphire crystal and offers 60m of water resistance. [seikata-wm-979bd91f6ff3]

Also known as: Tuna, Emperor

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

14.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Navy

Jewels

27j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1978

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