What does a 1918 over 17 D buffalo nickel look like?

This famous error resulted from an attempt to reuse a leftover 1917 die by cutting an "8" over the last digit.

The top of the 7 appears clearly behind the 8, giving it a flat shape instead of being rounded. The downstroke of the 7 runs through the top loop of the 8 and into the side of the bottom loop, making it appear to be half-filled rather than open.