Seiko Cal. 6391 - 772

The Seiko 6391-772 represents an important milestone in Seiko's 1999 lineup. Powered by the 6391 caliber with 32j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-c014e5b3ef85]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

39mm

Case Thickness

15.3mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

60m

Dial Color

Cream

Jewels

32j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1999

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