Seiko Cal. 6391 - 561

The Seiko 6391-561 represents an important milestone in Seiko's 1969 lineup. With its 18mm lug width and 15.8mm profile, it sits comfortably on most wrists. [seikata-wm-95a0d0b980d7]

Also known as: Sumo, Emperor

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

41mm

Case Thickness

15.8mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Cream

Jewels

33j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1969

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