Seiko Cal. 3870 - 821

The 3870-821 is a sought-after Solar piece from Seiko's golden era. Powered by the 3870 caliber with 25j jewels beating at 21,600 bph, it delivers a 48 hours power reserve. [seikata-wm-70fb8600313c]

Also known as: Samurai

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

41mm

Case Thickness

14.2mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Champagne

Jewels

25j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1976

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