Therefore , a degrade silver coinage was issued containing only fifty per cent silver .
As a result of the war from 1914 -- 18 , the price of silver grew dramatically , until in 1920 the coins were worth more than the actual silver .
A degrade silver coinage was issued containing only fifty per cent silver .
As a result of the war from 1914 -- 18 , the price of silver grew dramatically , until in 1920 the coins were worth more than the actual silver .