Why did people describe something without value as "not worth a Continental"

People would describe something without value as a "not worth a continental" because they would think that if it didn't have value then nobody is going to want it, And if it were a merchant or a seller it would get no sales so it would become useless and a "not worth continental."

judicial because its legislative, executive and judicial

in the 1950s, country music came into its own before rock-n-roll took off in the 60s while jazz and classical music continued to innovate