Some history first:
Germany went through its worst inflation in 1923. In 1922, the highest denomination was 50,000 Mark. By 1923, the highest denomination was 100,000,000,000,000 Mark. In December 1923 the exchange rate was 4,200,000,000,000 Marks to 1 US dollar. In 1923, the rate of inflation hit 3.25 × 106 percent per month (prices double every two days).
Depending in the type of bond, coupons were either attached to or separate from the bond itself. These coupons were dated as to the date interest on the bonds could be collected. Needless to say, with the inflation rate, these bonds (and the coupons) soon became worthless, except to collectors.
Don.....