Seiko Cal. 6390 - 308

This Spring Drive model from 1976 features a 40mm Two-Tone case. With its 18mm lug width and 9.3mm profile, it sits comfortably on most wrists. [seikata-wm-fa87c14b8c46]

Also known as: Crown, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

9.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Silver

Jewels

22j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1976

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