Seiko Cal. 3812 - 663

Released in 1972, the Cal. 3812 with design code 663 was part of Seiko's domestic market collection. Powered by the 3812 caliber with 36j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-81a6bd5faf6d]

Also known as: Sumo, Golden Tuna

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

9.7mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Navy

Jewels

36j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1972

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