Seiko Cal. 6650 - 658

The Seiko 6650-658 represents an important milestone in Seiko's 1978 lineup. Powered by the 6650 caliber with 17j jewels beating at 28,800 bph, it delivers a 63 hours power reserve. [seikata-wm-40ef638fbcb4]

Also known as: Bullhead, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

11.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Burgundy

Jewels

17j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1978

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