Seiko Cal. 6647 - 752

The Seiko 6647-752 represents an important milestone in Seiko's 1978 lineup. With its 18mm lug width and 13.7mm profile, it sits comfortably on most wrists. [seikata-wm-3999c6e1f3e3]

Also known as: Silverwave, Baby Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

13.7mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

40m

Dial Color

White

Jewels

26j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1978

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