Seiko Cal. 6391 - 791

Seiko 6391-791

The Seiko 6391-791 represents an important milestone in Seiko's 1968 lineup. Powered by the 6391 caliber with 29j jewels beating at 21,600 bph, it delivers a 48 hours power reserve. [seikata-wm-a6fd8923f7b1]

Also known as: Bullhead, Arnie

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
42mm
Case Thickness
15.9mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
90m
Dial Color
Silver
Jewels
29j
Frequency
21,600 bph
Power Reserve
48 hours
Year
1968

Related Models

seikata-wm-a6fd8923f7b1