Seiko Cal. 6691 - 977

The Seiko 6691-977 represents an important milestone in Seiko's 1979 lineup. It features a Green dial protected by a Mineral crystal and offers 50m of water resistance. [seikata-wm-b4ecb2b825e6]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

38mm

Case Thickness

15.3mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

50m

Dial Color

Green

Jewels

32j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1979

Related Models

• Seiko 0793-732
• Seiko 5640-481
• Seiko 6235-807
• Seiko 4558-585
• Seiko 7059-851
• Seiko 3867-727
• Seiko 7038-940
• Seiko 7169-594
• Seiko 6316-164
• Seiko 4545-728
• Seiko 4511-214
• Seiko 6336-361