Seiko Cal. 3870 - 660

The Seiko 3870-660 represents an important milestone in Seiko's 1965 lineup. Powered by the 3870 caliber with 27j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-aac556d37127]

Also known as: Baby Tuna

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

46mm

Case Thickness

12.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Champagne

Jewels

27j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1965

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