Seiko Cal. 5640 - 815

The 5640-815 is a sought-after Hand-Winding piece from Seiko's golden era. With its 19mm lug width and 8.0mm profile, it sits comfortably on most wrists. [seikata-wm-4850e42da059]

Also known as: Samurai

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

40mm

Case Thickness

8.0mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Green

Jewels

23j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1965

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