Seiko Cal. 5647 - 240

Released in 1978, the Cal. 5647 with design code 240 was part of Seiko's domestic market collection. With its 18mm lug width and 10.8mm profile, it sits comfortably on most wrists. [seikata-wm-57c0ff3fec45]

Also known as: Helmet, Arnie

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

46mm

Case Thickness

10.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Navy

Jewels

27j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1978

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