Girard-Perregaux has unveiled a limited edition watch, as part of its ww.tc collection, dedicated to renowned British watchmaker and inventor of the H-4 watch, John Harrison. This unique Girard-Perregaux ww.tc Enamel John Harrison watch displays the time from 24 time zones around the world. Its dial displays the journey undertaken by John Harrison’s son William from Portsmouth, England, to Port Royal, Jamaica, against a map of the Atlantic Ocean. The contours of the map are engraved on an unprocessed plate of white gold, while the compass rose, showing the eight directions of the wind and measuring no more than 3 mm, is hand-sculpted by a craftsman-engraver. The liquid green and blue enamel, which shows the earth’s most dominant colors, has been applied with the help of a brush, but only after vitrification of the surface at 800 degrees centigrade, which is then cooled, and hard brushed by using special paper and stone to give it a smooth texture.

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