Looks like at least an 65. These will become very scarce because of the popularity.
The item "1907 $20 St. Gaudens Gold Double Eagle MS-64 NGC, Better Coin" is in sale since Wednesday, July 4, 2018. This item is in the category "Coins & Paper Money\Coins\ US\Errors".The seller is "mantallntan" and is located in Vero Beach, Florida. This item can be shipped to United States, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, Sweden, Indonesia, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Bahrain, Croatia, Malaysia, Brazil.