The large 0 can be distinguished by observing the size of the number. The large "0" is noticeably taller than the rest of the numbers and there is less spacing between the liberty bust portrait and the number. This variety has small letters in the words "UNITED STATES OF AMERICA" on the reverse. The spacing between the words "UNITED" and "STATES" is much narrower on the small letters variety, The "C" in "50 C." is much smaller in the small letters variety.
