Seiko Cal. 6648 - 310

This Hand-Winding model from 1968 features a 40mm Two-Tone case. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 30m of water resistance. [seikata-wm-d91bd254941e]

Also known as: Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

40mm

Case Thickness

11.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1968

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