<Tr> <Th> Diameter </Th> <Td> (1816--1970) 23.60 mm </Td> </Tr> <Tr> <Th> Edge </Th> <Td> Milled </Td> </Tr> <Tr> <Th> Composition </Th> <Td> (1503--1816) Silver (1816--1920) 92.5% Ag (1920--1946) 50% Ag (1947--1970) Cupronickel </Td> </Tr> <Tr> <Th> Years of minting </Th> <Td> c. 1503--1970 </Td> </Tr>

What is one shilling worth in today's money