The Audemars Piguet Royal Oak Extra-Thin The Hour Glass Edition is the first and only Royal Oak “Jumbo” ref. 15202 produced in 18 ct. yellow gold – arguably the most classic metal for the Royal Oak aside from steel. To go with the yellow gold case and bracelet, the dial is a dark green, with the hands, hour markers and applied AP logo also in yellow gold. And most notably, the hexagonal nuts on the bezel are also yellow gold, instead of the conventional white gold.

Made in a limited edition of 50 pieces, this has the same specifications as the regular production Royal Oak Extra-Thin, which is available only in steel or rose gold. The case is 39mm wide and 8.1mm high. Inside is the calibre 2121, which has a rotor engraved with the logo of The Hour Glass and “One of Fifty”.

The dark green dial with the signature tapisserie guilloche of the Royal Oak

The Audemars Piguet Royal Oak Extra-Thin The Hour Glass Edition (ref. 15205BA.OO.1240BA.01) has a retail price of S$79,600, equivalent to US$59,000. Deliveries will start August 2015 and this edition is available only from The Hour Glass.

Update July 1, 2015: Updated to remove reference to The Hour Glass 35th anniversary and additional photos added.