I have two war time machines.
My Midway Millmaster was built in March of 42.
Jimmy Doolittle and his boys were training hard to make short take-offs then and aside from Doolittle himself, None of them knew what they were training for or where they were going.
Also my recently purchased Monarch 12CK. It was built 2 months later during the time of the Battle of the Coral Sea which was the first check on the Japanese advancement into the South Pacific.
My Monarch has a crack at the bottom of the base under the headstock which has been welded. Probably a moving accident but I like to imagine it was aboard a ship that took a shell from a Japanese cruiser or a Long Lance torpedo from a destroyer at the battle of Tassafaronga or some such and survived the day to make it home for repairs.