Seiko Cal. 3871 - 650

This Solar model from 1977 features a 37mm Hardlex-Coated Steel case. Powered by the 3871 caliber with 30j jewels beating at 21,600 bph, it delivers a 51 hours power reserve. [seikata-wm-f2d5380b81fc]

Also known as: Helmet, World Timer

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

9.7mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

190m

Dial Color

Burgundy

Jewels

30j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1977

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