Seiko Cal. 3839 - 684

The Seiko 3839-684 represents an important milestone in Seiko's 1978 lineup. With its 21mm lug width and 10.9mm profile, it sits comfortably on most wrists. [seikata-wm-155b24c7e655]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

46mm

Case Thickness

10.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1978

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