The reverse side of the California <a href="https://en.wikipedia.org/wiki/State_Quarter" class="extiw" title="en:State Quarter">State Quarter</a>.  It is a "proof".
United States Mint
<a rel="nofollow" class="external free" href="https://www.usmint.gov/downloads/pressroom/50States/pc/ca_proof_pc.zip">http://www.usmint.gov/downloads/pressroom/50States/pc/ca_proof_pc.zip</a>