These were made independently by the artist so it would not be likely to find any two alike !! Thats the point !! How it is made is uo to the individual,, they are not mass produced !! The mud color depends on the region it was made !! The China stamp is only used if it was intended for sale outside of china,, it was intended as an export !! If it was to be sold inside the country would not have “China” on it !! No need for country of origin unless it was to be shipped to other countries !! Then you need a country of origin stamp !! Some only have it on a stick on label !! Many sold in the U.S without a country of origin stamp had a stick on label that was taken off !!