Seiko Cal. 6391 - 821

Released in 1974, the Cal. 6391 with design code 821 was part of Seiko's domestic market collection. With its 18mm lug width and 12.5mm profile, it sits comfortably on most wrists. [seikata-wm-6cbc1015db15]

Also known as: Shogun, Bullhead

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

12.5mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

180m

Dial Color

Silver

Jewels

36j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1974

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