Seiko Cal. 6391 - 354

Released in 1999, the Cal. 6391 with design code 354 was part of Seiko's domestic market collection. Powered by the 6391 caliber with 18j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-ba6edc9c88f4]

Also known as: Helmet, UFO

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

34mm

Case Thickness

14.3mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

200m

Dial Color

Black

Jewels

18j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1999

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