Seiko Cal. 3879 - 761

The 3879-761 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3879 caliber with 27j jewels beating at 36,000 bph, it delivers a 40 hours power reserve. [seikata-wm-0eada4c7f5ab]

Also known as: Sumo, UFO

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

39mm

Case Thickness

11.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1985

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