Seiko Cal. 6691 - 939

The Seiko 6691-939 represents an important milestone in Seiko's 1978 lineup. It features a Champagne dial protected by a Sapphire crystal and offers 170m of water resistance. [seikata-wm-74d8b126b299]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

10.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Champagne

Jewels

21j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1978

Related Models

• Seiko 6392-434
• Seiko 5676-819
• Seiko 5233-974
• Seiko 0731-919
• Seiko 5281-103
• Seiko 4443-959
• Seiko 4554-109
• Seiko 6252-437
• Seiko 6175-302
• Seiko 4540-400
• Seiko 6618-569
• Seiko 4423-680