Seiko Cal. 6387 - 693

This Quartz model from 1991 features a 40mm PVD Black case. Powered by the 6387 caliber with 19j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-c421e39cb1fc]

Also known as: Monster, Sumo

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

40mm

Case Thickness

15.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

White

Jewels

19j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1991

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