Seiko Cal. 3877 - 863

The 3877-863 is a sought-after Automatic piece from Seiko's golden era. Powered by the 3877 caliber with 23j jewels beating at 28,800 bph, it delivers a 53 hours power reserve. [seikata-wm-92a175d8c265]

Also known as: Rally, Sportsmatic

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

43mm

Case Thickness

12.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

70m

Dial Color

White

Jewels

23j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1973

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