Certified coins that are not gold, silver, platinum or palladium — clad and base-metal issues, and the handful of pieces whose composition sits outside the four. The United States clad half dollars are the bulk of it: the 2019-S Enhanced Reverse Proof Kennedy, the 50th anniversary strikes, and the commemorative issues that were struck in copper-nickel rather than silver.

These are graded on exactly the same terms as everything else here. A clad half in PF 70 is still a single certified example with its own certification number, and the grade is still the whole argument.