The artifacts were already in crates, but the wooden boxes weren’t sturdy enough to ship. So the bureau paid to have new, custom crates fitted over the old ones. The result was hardy but heavy.
"I was in the crate for five days and ended up in a freight ... Over the course of his journey, he had become frozen rigid in his wooden box. The Americans did not press charges.
Put simply: if you simply want to protect a device from interference (or prevent it from causing interference) then it’s enough to enclose it in a metal box ... Depot has wooden crates in ...
Brian Robson was a 19-year-old and working for Victorian Railways when he got homesick and decided to ask two Irishmen to put him in a crate and post him back to the UK ...