A rare Patek Philippe wristwatch was sold for HK$5,540,000 ($716,288) at Christie’s Hong Kong auction recently.

From the lot’s note

The reference 3974 was produced in 1989 to celebrate Patek Philippe’s 150th anniversary, the movement of the first model was numbered 1’906’000. The ingenious calibre R 27 Q impresses not only by its remarkable number of 467 parts but also by Patek Philippe’s masterly performance of combining a micro-rotor, minute repeating and perpetual calendar mechanisms in a proportionally small 12 1/2”’ movement.

More info about the sale can be found on Christie’s auction site