 Roberts delivered the first set of coins to Said bin Sultan on October 1 , 1835 . He delivered the next set to King Rama III of Siam the following year , on April 6 . Roberts died in Macau on June 12 , 1836 , before he could initiate contact with any other nations . On June 30 , Edmund P. Kennedy , commodore of the diplomatic fleet , wrote to the State Department that he had " directed that the presents [ which remained <unk> due to Robert 's death ] be forwarded to the United States " . The proof sets meant for Cochin @-@ China and Japan were likely included in the shipment of returned presents . All dollars struck for inclusion in the diplomatic gift sets were likely dated 1804 . It is unknown why that date was chosen for the dollars , but numismatic historian R.W. Julian suggests that it could have been done to prevent angering collectors who would not have been able to acquire the 1834 @-@ dated coin for their collections ; Chief Coiner Adam Eckfeldt , after consulting with Moore , mistakenly determined that 19 @,@ 570 dollars bearing the date 1804 were struck in that year . The dollars minted for the diplomatic gift sets , as well as other examples struck with the same dies , are collectively known as " Class I " 1804 dollars . In total , eight specimens of this type are known today . 
