Seiko Cal. 6331 - 555

The 6331-555 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Cream dial protected by a Hardlex crystal and offers 120m of water resistance. [seikata-wm-0640098642e3]

Also known as: Sportsmatic, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

41mm

Case Thickness

9.6mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Cream

Jewels

23j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1967

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