Seiko Cal. 6687 - 357

Released in 1982, the Cal. 6687 with design code 357 was part of Seiko's domestic market collection. Powered by the 6687 caliber with 30j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-76d3ec739ec6]

Also known as: UFO, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

39mm

Case Thickness

14.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

150m

Dial Color

Champagne

Jewels

30j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1982

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