Seiko Cal. 3811 - 928

This Automatic model from 1967 features a 39mm Two-Tone case. It features a Blue Sunburst dial protected by a Sapphire crystal and offers 110m of water resistance. [seikata-wm-020f9e4501df]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

39mm

Case Thickness

9.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1967

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