Seiko Cal. 3813 - 660

Released in 1980, the Cal. 3813 with design code 660 was part of Seiko's domestic market collection. Powered by the 3813 caliber with 30j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-bc2d1d7dfeb8]

Also known as: UFO, Crown

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

37mm

Case Thickness

12.9mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Burgundy

Jewels

30j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1980

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