Seiko Cal. 6387 - 677

The 6387-677 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6387 caliber with 18j jewels beating at 36,000 bph, it delivers a 41 hours power reserve. [seikata-wm-97ef47c2ae5f]

Also known as: Monster, Emperor

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

40mm

Case Thickness

9.7mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

150m

Dial Color

Silver

Jewels

18j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1967

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