Seiko Cal. 6615 - 651

This Spring Drive model from 1978 features a 38mm Stainless Steel case. The Rotating bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-f3ff521e8c5d]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

13.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

80m

Dial Color

Silver

Jewels

22j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1978

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