Seiko Cal. 6631 - 227

The 6631-227 is a sought-after Solar piece from Seiko's golden era. Powered by the 6631 caliber with 21j jewels beating at 36,000 bph, it delivers a 67 hours power reserve. [seikata-wm-52e8c22604ed]

Also known as: Navigator

Specifications

Movement

Solar

Case Material

Titanium

Case Width

34mm

Case Thickness

12.8mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Black

Jewels

21j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1966

Related Models

• Seiko 6342-763
• Seiko 0776-126
• Seiko 6192-807
• Seiko 6393-947
• Seiko 3899-462
• Seiko 0766-606
• Seiko 7090-526
• Seiko 6663-450
• Seiko 6114-787
• Seiko 5291-244
• Seiko 0792-508
• Seiko 4537-262