Seiko Cal. 6648 - 561

The Seiko 6648-561 represents an important milestone in Seiko's 1970 lineup. The Bidirectional bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-d662aab39b2b]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

9.9mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Black

Jewels

28j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1970

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