Seiko Cal. 3870 - 509

The Seiko 3870-509 represents an important milestone in Seiko's 1976 lineup. It features a Black dial protected by a Sapphire crystal and offers 130m of water resistance. [seikata-wm-ce412694f844]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

46mm

Case Thickness

9.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

130m

Dial Color

Black

Jewels

23j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1976

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