A previously unknown Patek Philippe desk clock comes to market for the first time tomorrow at Sotheby's. The third one of this type after the famous pair with eight-day movements made for Henry Graves Jr and James Ward Packard, this was made for Thomas Emery and has a 10 day power reserve. Notably, Thomas Emery also commissioned Patek Philippe’s first wrist-borne perpetual calendar in 1925. As the other two desk clocks are owned by Patek Philippe, this might be the last opportunity for a private