Seiko Cal. 6691 - 765

Released in 1971, the Cal. 6691 with design code 765 was part of Seiko's domestic market collection. Powered by the 6691 caliber with 25j jewels beating at 21,600 bph, it delivers a 72 hours power reserve. [seikata-wm-43b4ce597ba5]

Also known as: Navigator, Emperor

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

41mm

Case Thickness

15.4mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Cream

Jewels

25j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1971

Related Models

• Seiko 6240-455
• Seiko 7170-313
• Seiko 6377-704
• Seiko 7020-908
• Seiko 0757-258
• Seiko 4413-744
• Seiko 7010-905
• Seiko 3814-437
• Seiko 0774-954
• Seiko 5255-451
• Seiko 6653-183
• Seiko 7059-912