Seiko Cal. 3852 - 820

The Seiko 3852-820 represents an important milestone in Seiko's 1979 lineup. Powered by the 3852 caliber with 25j jewels beating at 36,000 bph, it delivers a 70 hours power reserve. [seikata-wm-4e12ecd76ad5]

Also known as: Sumo, Bullhead

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

40mm

Case Thickness

12.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

150m

Dial Color

Burgundy

Jewels

25j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1979

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