<Table> Columbian half dollar <Tr> <Td_colspan="2"> United States </Td> </Tr> <Tr> <Th> Value </Th> <Td> 50 cents (0.50 US dollars) </Td> </Tr> <Tr> <Th> Mass </Th> <Td> 12.5 g </Td> </Tr> <Tr> <Th> Diameter </Th> <Td> 30.61 mm (1.20 in) </Td> </Tr> <Tr> <Th> Thickness </Th> <Td> 2.15 mm (0.08 in) </Td> </Tr> <Tr> <Th> Edge </Th> <Td> Reeded </Td> </Tr> <Tr> <Th> Composition </Th> <Td> <Ul> <Li> 90.0% silver </Li> <Li> 10.0% copper </Li> </Ul> </Td> </Tr> <Tr> <Th> Silver </Th> <Td> 0.36169 troy oz </Td> </Tr> <Tr> <Th> Years of minting </Th> <Td> 1892--1893 </Td> </Tr> <Tr> <Th> Mint marks </Th> <Td> None (all struck at the Philadelphia Mint without mint mark) </Td> </Tr> <Tr> <Th_colspan="2"> Obverse </Th> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Design </Th> <Td> Right - facing portrait of Columbus flanked by the words "United States of America" and "Columbian Half Dollar". </Td> </Tr> <Tr> <Th> Designer </Th> <Td> Charles E. Barber, after a concept by Olin Levi Warner </Td> </Tr> <Tr> <Th> Design date </Th> <Td> 1892 </Td> </Tr> <Tr> <Th_colspan="2"> Reverse </Th> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Design </Th> <Td> Port view of the Santa María above two hemispheres flanked by the date 1492 . "World's Columbian Exposition Chicago" encircles the rim with the date of striking at bottom . </Td> </Tr> <Tr> <Th> Designer </Th> <Td> George T. Morgan, after a concept by Olin Levi Warner </Td> </Tr> <Tr> <Th> Design date </Th> <Td> 1892 </Td> </Tr> </Table> <Tr> <Td_colspan="2"> United States </Td> </Tr> <Tr> <Th> Value </Th> <Td> 50 cents (0.50 US dollars) </Td> </Tr> <Tr> <Th> Mass </Th> <Td> 12.5 g </Td> </Tr>

1892 columbian half dollar world's columbian exposition chicago