I had done 15 black and white pieces for a well known political thriller, The Day of the Jackal by Frederick Forsyth, published by The Folio Society.
I came up with an idea of opening a hole on one side of the slipcase, and they made it.
Some roughs including unused ones.
It was hard for me to figure out how the Jackal's special rifle was constructed.
Bought these for reference.