Seiko Cal. 3897 - 923

This Hand-Winding model from 1981 features a 40mm Two-Tone case. With its 21mm lug width and 12.8mm profile, it sits comfortably on most wrists. [seikata-wm-a434003db03c]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

40mm

Case Thickness

12.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Navy

Jewels

30j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1981

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