Seiko Cal. 6647 - 718

This Spring Drive model from 1965 features a 38mm PVD Black case. Powered by the 6647 caliber with 26j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-f45c301e38ec]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

38mm

Case Thickness

12.3mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Silver

Jewels

26j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1965

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