Seiko Cal. 3840 - 852

The 3840-852 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 3840 caliber with 24j jewels beating at 36,000 bph, it delivers a 64 hours power reserve. [seikata-wm-d83798d7fb96]

Also known as: Turtle, Sumo

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

9.7mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Black

Jewels

24j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1966

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