Seiko Cal. 3877 - 746

The 3877-746 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3877 caliber with 32j jewels beating at 21,600 bph, it delivers a 38 hours power reserve. [seikata-wm-7711b10bfd35]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

11.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Cream

Jewels

32j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1989

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