Seiko Cal. 5648 - 521

The Seiko 5648-521 represents an important milestone in Seiko's 1970 lineup. Powered by the 5648 caliber with 35j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-e05d4034ae03]

Also known as: Sumo, Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

42mm

Case Thickness

11.2mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

60m

Dial Color

Champagne

Jewels

35j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1970

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