Seiko Cal. 0721 - 685

The Seiko 0721-685 represents an important milestone in Seiko's 1977 lineup. Powered by the 0721 caliber with 24j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-19f5386f2a72]

Also known as: Baby Tuna

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

14.0mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Navy

Jewels

24j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1977

Related Models

• Seiko 4415-332
• Seiko 5644-169
• Seiko 5628-896
• Seiko 4469-380
• Seiko 5669-951
• Seiko 4575-119
• Seiko 5636-550
• Seiko 6292-694
• Seiko 6129-216
• Seiko 6396-812
• Seiko 6175-533
• Seiko 5257-379