Seiko Cal. 5678 - 794

The Seiko 5678-794 represents an important milestone in Seiko's 1977 lineup. Powered by the 5678 caliber with 20j jewels beating at 21,600 bph, it delivers a 38 hours power reserve. [seikata-wm-0e29718d73f6]

Also known as: Sumo, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

39mm

Case Thickness

11.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Green

Jewels

20j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1977

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