Three years ago Graham revealed its limited-to-20-examples Graham Tourbillon Orrery watch that featured a specially made, ultra complicated movement, and carried a $300,000-plus asking price.

New for 2017, the Swiss watch brand has introduced the Geo.Graham Orrery Tourbillon, an astronomical watch with the same planetarium-style display featuring the Sun, Moon, Earth, and Mars as its predecessor. This time, though, different materials have been used.

The Earth model is crafted from Kingman Turquoise, while the Moon and Mars models are both crafted from pieces of meteorites. The sun is represented by an 18k pink gold bridge placed over the tourbillon.

Worth noting is the 100-year indicator found on the back of the watch on the movement, which serves as a year scale. Graham also included two additional 100-year discs, which may be installed by a watchmaker at century’s end: the company wants this timepiece to be a family heirloom for generations to come.

Powering the stunning Graham timepiece is the caliber G1800 Tourbillon Orrery, which features a 72-hour power reserve.

The once-in-a-lifetime Geo.Graham Orrery Tourbillon is priced at $330,000, and will be limited to just 8 editions.