Seiko Cal. 3857 - 187

This Solar model from 1980 features a 43mm PVD Black case. Powered by the 3857 caliber with 21j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-8b8134b699a0]

Also known as: Tuna, Navigator

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

43mm

Case Thickness

8.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Burgundy

Jewels

21j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1980

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