Seiko Cal. 5640 - 365

The Seiko 5640-365 represents an important milestone in Seiko's 1989 lineup. It features a Black dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-c875d17f4b55]

Also known as: Goldfeather, Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

42mm

Case Thickness

10.1mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

30m

Dial Color

Black

Jewels

19j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1989

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