Seiko Cal. 5644 - 416

The Seiko 5644-416 represents an important milestone in Seiko's 1971 lineup. It features a Blue Sunburst dial protected by a Acrylic crystal and offers 70m of water resistance. [seikata-wm-9d4f8fd9671d]

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

38mm

Case Thickness

11.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1971

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