Seiko Cal. 3870 - 510

The Seiko 3870-510 represents an important milestone in Seiko's 1971 lineup. It features a Navy dial protected by a Mineral crystal and offers 120m of water resistance. [seikata-wm-ef25a946f6d3]

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

44mm

Case Thickness

10.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

120m

Dial Color

Navy

Jewels

26j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1971

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