Seiko Cal. 5644 - 940

Released in 1978, the Cal. 5644 with design code 940 was part of Seiko's domestic market collection. It features a Blue Sunburst dial protected by a Sapphire crystal and offers 50m of water resistance. [seikata-wm-dc4cfa7e9dd3]

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

40mm

Case Thickness

12.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1978

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