Seiko Cal. 3877 - 786

The Seiko 3877-786 represents an important milestone in Seiko's 1970 lineup. Powered by the 3877 caliber with 30j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-106fb4f68a90]

Also known as: Bullhead, Baby Tuna

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

15.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Silver

Jewels

30j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1970

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