Seiko Cal. 3871 - 640

The Seiko 3871-640 represents an important milestone in Seiko's 1966 lineup. Powered by the 3871 caliber with 26j jewels beating at 28,800 bph, it delivers a 71 hours power reserve. [seikata-wm-f7bcea0bbbf1]

Also known as: Arnie

Specifications

Movement

Solar

Case Material

Titanium

Case Width

46mm

Case Thickness

12.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

White

Jewels

26j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1966

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