Seiko Cal. 6381 - 563

Released in 1969, the Cal. 6381 with design code 563 was part of Seiko's domestic market collection. With its 18mm lug width and 13.4mm profile, it sits comfortably on most wrists. [seikata-wm-dfb9ec8968b0]

Also known as: Tuna, Helmet

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

13.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

90m

Dial Color

White

Jewels

21j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1969

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