Seiko Cal. 6191 - 633

Released in 1987, the Cal. 6191 with design code 633 was part of Seiko's domestic market collection. Powered by the 6191 caliber with 28j jewels beating at 28,800 bph, it delivers a 49 hours power reserve. [seikata-wm-ab24df60f8fc]

Also known as: Tuna, UFO

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

37mm

Case Thickness

13.8mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

50m

Dial Color

Navy

Jewels

28j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1987

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