Below you will find the solution for: Seen here is an early 20th century machine for this which the U.S. Postal Service began doing in 1857 Jeopardy .
Since you already solved the question Seen here is an early 20th century machine for this which the U.S. Postal Service began doing in 1857 which had the answer PERFORATING THE STAMPS, you can simply go back at the main post to check the other answers. You can do so by clicking the link here Jeopardy May 22 2021
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