Seiko Cal. 4515 - 378

The Seiko 4515-378 represents an important milestone in Seiko's 1982 lineup. The Fixed bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-3c24d555201d]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

42mm

Case Thickness

10.8mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

40m

Dial Color

Burgundy

Jewels

18j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1982

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