Seiko Cal. 6391 - 499

The Seiko 6391-499 represents an important milestone in Seiko's 1971 lineup. Powered by the 6391 caliber with 36j jewels beating at 21,600 bph, it delivers a 54 hours power reserve. [seikata-wm-6389062d5cf1]

Also known as: Tuna, Navigator

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

35mm

Case Thickness

10.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

40m

Dial Color

Silver

Jewels

36j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1971

Related Models

• Seiko 5258-804
• Seiko 6231-930
• Seiko 4414-898
• Seiko 6632-817
• Seiko 5669-107
• Seiko 7073-452
• Seiko 4547-773
• Seiko 5626-546
• Seiko 6126-847
• Seiko 7157-802
• Seiko 6671-514
• Seiko 7098-877