Seiko Cal. 5648 - 440

The Seiko 5648-440 represents an important milestone in Seiko's 1989 lineup. Powered by the 5648 caliber with 25j jewels beating at 28,800 bph, it delivers a 63 hours power reserve. [seikata-wm-40484d6361d5]

Also known as: Bullhead, Sportsmatic

Specifications

Movement

Solar

Case Material

Titanium

Case Width

40mm

Case Thickness

12.3mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Black

Jewels

25j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1989

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