Seiko Cal. 6640 - 478

The Seiko 6640-478 represents an important milestone in Seiko's 1967 lineup. Powered by the 6640 caliber with 28j jewels beating at 28,800 bph, it delivers a 47 hours power reserve. [seikata-wm-208b6b146f31]

Also known as: Pogue, Flighty

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

8.7mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Navy

Jewels

28j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1967

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