Seiko Cal. 3870 - 515

Released in 1968, the Cal. 3870 with design code 515 was part of Seiko's domestic market collection. With its 19mm lug width and 13.6mm profile, it sits comfortably on most wrists. [seikata-wm-11dd333cf74e]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

39mm

Case Thickness

13.6mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

150m

Dial Color

Silver

Jewels

29j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1968

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