Seiko Cal. 6699 - 231

Released in 1976, the Cal. 6699 with design code 231 was part of Seiko's domestic market collection. It features a Navy dial protected by a Sapphire crystal and offers 140m of water resistance. [seikata-wm-fb6b8ae29abe]

Also known as: Helmet, Golden Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

45mm

Case Thickness

8.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Navy

Jewels

19j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1976

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