Seiko Cal. 6689 - 613

The Seiko 6689-613 represents an important milestone in Seiko's 1978 lineup. Powered by the 6689 caliber with 29j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-ad943c0443b3]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

13.7mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

120m

Dial Color

Burgundy

Jewels

29j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1978

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