Seiko Cal. 4548 - 681

The Seiko 4548-681 represents an important milestone in Seiko's 1981 lineup. Powered by the 4548 caliber with 33j jewels beating at 21,600 bph, it delivers a 54 hours power reserve. [seikata-wm-1b812ae38dd6]

Also known as: Sumo, Flighty

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

40mm

Case Thickness

14.6mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Black

Jewels

33j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1981

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