Seiko Cal. 3897 - 864

The Seiko 3897-864 represents an important milestone in Seiko's 1966 lineup. It features a Blue Sunburst dial protected by a Sapphire crystal and offers 100m of water resistance. [seikata-wm-68c662460669]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

10.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1966

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