Seiko Cal. 4447 - 877

The Seiko 4447-877 represents an important milestone in Seiko's 1971 lineup. Powered by the 4447 caliber with 24j jewels beating at 28,800 bph, it delivers a 60 hours power reserve. [seikata-wm-048d758f2d6e]

Also known as: Helmet, Navigator

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

45mm

Case Thickness

14.5mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

170m

Dial Color

Champagne

Jewels

24j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1971

Related Models

• Seiko 6372-968
• Seiko 4423-298
• Seiko 0742-337
• Seiko 6276-773
• Seiko 7088-581
• Seiko 6237-359
• Seiko 4452-160
• Seiko 6181-730
• Seiko 0731-528
• Seiko 4436-374
• Seiko 5635-443
• Seiko 6124-748