Seiko Cal. 0721 - 721

This Hand-Winding model from 1970 features a 41mm Titanium case. Powered by the 0721 caliber with 24j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-df263acf505c]

Also known as: Bellmatic, Navigator

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

41mm

Case Thickness

8.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1970

Related Models

• Seiko 5664-193
• Seiko 6343-259
• Seiko 6378-831
• Seiko 6614-655
• Seiko 6280-596
• Seiko 4495-311
• Seiko 6113-112
• Seiko 5697-110
• Seiko 6226-332
• Seiko 5675-250
• Seiko 7054-274
• Seiko 6645-517