Seiko Cal. 3812 - 656

The 3812-656 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 3812 caliber with 29j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-5145147e2551]

Also known as: Crown, Arnie

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

12.0mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

150m

Dial Color

White

Jewels

29j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1972

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