Seiko Cal. 5640 - 748

The 5640-748 is a sought-after Kinetic piece from Seiko's golden era. With its 20mm lug width and 11.0mm profile, it sits comfortably on most wrists. [seikata-wm-fa4da632981b]

Also known as: Sea Horse

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

45mm

Case Thickness

11.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Navy

Jewels

22j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1970

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