The collection of 650 coins was built up over 35 years by Texas property developer A. Mack Pogue and his son , D. Brent Pogue . It includes a coveted 1804 silver dollar worth $ 5 , which is known as the 'pinnacle ' of coin collecting . Each steel die used to strike coins in the early 1800s was painstakingly produced by hand , creating variations that are prized by collectors . It will be sold in a series of seven auctions in New York and London , beginning on 19 May and culminating in a final sale in May 2017 .
The collection of 650 coins was built up over 35 years by Texas property developer A. Mack Pogue and his son , D. Brent Pogue . It includes a coveted 1804 silver dollar worth $ 9.8million , which is known as the 'pinnacle ' of coin collecting . Each steel die used to strike coins in the early 1800s was painstakingly produced by hand , creating variations that are prized by collectors . It will be sold in a series of seven auctions in New York and London , beginning on 19 May and culminating in a final sale in May 2017 .