Seiko Cal. 6331 - 236

This Hand-Winding model from 1977 features a 43mm Stainless Steel case. It features a Burgundy dial protected by a Sapphire crystal and offers 90m of water resistance. [seikata-wm-56d58fee0aeb]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

12.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Burgundy

Jewels

24j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1977

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