Seiko Cal. 6690 - 961

The 6690-961 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6690 caliber with 21j jewels beating at 28,800 bph, it delivers a 57 hours power reserve. [seikata-wm-05da5ea3c764]

Also known as: Crown, Baby Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

41mm

Case Thickness

12.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

190m

Dial Color

Burgundy

Jewels

21j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1968

Related Models

• Seiko 6256-330
• Seiko 4439-396
• Seiko 0763-714
• Seiko 4593-299
• Seiko 4438-151
• Seiko 4579-326
• Seiko 0790-693
• Seiko 6687-712
• Seiko 6284-827
• Seiko 3834-981
• Seiko 4411-562
• Seiko 5281-263