Seiko Cal. 5287 - 639

The Seiko 5287-639 represents an important milestone in Seiko's 1996 lineup. Powered by the 5287 caliber with 34j jewels beating at 28,800 bph, it delivers a 67 hours power reserve. [seikata-wm-91c0b29a92ea]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

41mm

Case Thickness

10.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

White

Jewels

34j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1996

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