<Table> Standing Liberty quarter <Tr> <Td_colspan="2"> United States </Td> </Tr> <Tr> <Th> Value </Th> <Td> 25 cents (. 25 US dollars) </Td> </Tr> <Tr> <Th> Mass </Th> <Td> 6.25 g </Td> </Tr> <Tr> <Th> Diameter </Th> <Td> 24.3 mm </Td> </Tr> <Tr> <Th> Edge </Th> <Td> reeded </Td> </Tr> <Tr> <Th> Composition </Th> <Td>. 900 silver, . 100 copper </Td> </Tr> <Tr> <Th> Silver </Th> <Td>. 18084 troy oz </Td> </Tr> <Tr> <Th> Years of minting </Th> <Td> 1916--1930 </Td> </Tr> <Tr> <Th> Mint marks </Th> <Td> D, S. Found immediately to the right of the lowest of the left - hand column of stars on the obverse (to the left of Liberty's feet .) Philadelphia Mint specimens lack mint mark . </Td> </Tr> <Tr> <Th_colspan="2"> Obverse </Th> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Design </Th> <Td> 1916 version </Td> </Tr> <Tr> <Th> Designer </Th> <Td> Hermon MacNeil </Td> </Tr> <Tr> <Th> Design date </Th> <Td> 1916 </Td> </Tr> <Tr> <Th> Design discontinued </Th> <Td> 1916 </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Design </Th> <Td> Type 1 </Td> </Tr> <Tr> <Th> Designer </Th> <Td> Hermon MacNeil </Td> </Tr> <Tr> <Th> Design date </Th> <Td> 1917 </Td> </Tr> <Tr> <Th> Design discontinued </Th> <Td> 1917 </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Design </Th> <Td> Type 2 or Type 2a </Td> </Tr> <Tr> <Th> Designer </Th> <Td> Hermon MacNeil </Td> </Tr> <Tr> <Th> Design date </Th> <Td> 1917 </Td> </Tr> <Tr> <Th> Design discontinued </Th> <Td> 1924 </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Design </Th> <Td> Type 3 or Type 2b </Td> </Tr> <Tr> <Th> Designer </Th> <Td> Hermon MacNeil </Td> </Tr> <Tr> <Th> Design date </Th> <Td> 1925 </Td> </Tr> <Tr> <Th> Design discontinued </Th> <Td> 1930 </Td> </Tr> <Tr> <Th_colspan="2"> Reverse </Th> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Design </Th> <Td> 1916 version </Td> </Tr> <Tr> <Th> Designer </Th> <Td> Hermon MacNeil </Td> </Tr> <Tr> <Th> Design date </Th> <Td> 1916 </Td> </Tr> <Tr> <Th> Design discontinued </Th> <Td> 1916 </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Design </Th> <Td> Type 1 </Td> </Tr> <Tr> <Th> Designer </Th> <Td> Hermon MacNeil </Td> </Tr> <Tr> <Th> Design date </Th> <Td> 1917 </Td> </Tr> <Tr> <Th> Design discontinued </Th> <Td> 1917 </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Design </Th> <Td> Type 2 and 3 </Td> </Tr> <Tr> <Th> Designer </Th> <Td> Hermon MacNeil </Td> </Tr> <Tr> <Th> Design date </Th> <Td> 1917 </Td> </Tr> <Tr> <Th> Design discontinued </Th> <Td> 1930 </Td> </Tr> </Table> <Tr> <Td_colspan="2"> United States </Td> </Tr>

Where is the mint mark on the standing liberty quarter