This is Patek Philippe's first Grand Complication, and that alone means a lot. The Palmer watch represent a pinnacle in watch collecting, with indisputable horological significance and remarkable, concrete provenance, with pristine condition. Christie's has an estimate on the Palmer Grand Complication of $1,000,000 to $1,500,000 and you can read more about it, and its original owner right here.

You can see a short video on the watch produced by Christie's right here: