Seiko Cal. 5642 - 649

The Seiko 5642-649 represents an important milestone in Seiko's 1987 lineup. Powered by the 5642 caliber with 20j jewels beating at 28,800 bph, it delivers a 47 hours power reserve. [seikata-wm-39079ef96f57]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

46mm

Case Thickness

15.9mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Champagne

Jewels

20j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1987

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