Seiko Cal. 5687 - 684

The Seiko 5687-684 represents an important milestone in Seiko's 1971 lineup. Powered by the 5687 caliber with 32j jewels beating at 36,000 bph, it delivers a 45 hours power reserve. [seikata-wm-42a5947fadd2]

Also known as: Sumo, UFO

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

14.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Navy

Jewels

32j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1971

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