Seiko Cal. 5661 - 321

The Seiko 5661-321 represents an important milestone in Seiko's 1981 lineup. The Coin-Edge bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-39f320222259]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

15.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Navy

Jewels

22j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1981

Related Models

• Seiko 6384-904
• Seiko 3843-338
• Seiko 7155-737
• Seiko 7180-576
• Seiko 5256-538
• Seiko 0723-636
• Seiko 3836-798
• Seiko 3828-730
• Seiko 0746-227
• Seiko 4566-686
• Seiko 6357-612
• Seiko 4458-786