Seiko Cal. 3870 - 561

Released in 1975, the Cal. 3870 with design code 561 was part of Seiko's domestic market collection. Powered by the 3870 caliber with 26j jewels beating at 21,600 bph, it delivers a 38 hours power reserve. [seikata-wm-36d3238a0edb]

Also known as: Baby Tuna, Emperor

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

45mm

Case Thickness

12.9mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Green

Jewels

26j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1975

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