Seiko Cal. 5648 - 438

The Seiko 5648-438 represents an important milestone in Seiko's 1997 lineup. Powered by the 5648 caliber with 30j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-988a705f1e52]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

13.9mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

120m

Dial Color

Silver

Jewels

30j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1997

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