Seiko Cal. 6340 - 642

The Seiko 6340-642 represents an important milestone in Seiko's 1977 lineup. Powered by the 6340 caliber with 27j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-4fa0de549d5e]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

10.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

140m

Dial Color

Cream

Jewels

27j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1977

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