Seiko Cal. 5640 - 165

Released in 1968, the Cal. 5640 with design code 165 was part of Seiko's domestic market collection. It features a Green dial protected by a Acrylic crystal and offers 120m of water resistance. [seikata-wm-2ea074da63c9]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

13.3mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Green

Jewels

23j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1968

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