I figured you weren’t Navy, but didn’t have any pics of Air Force guys sewing. Sorry! LOL
Last night I was reading something about guys on ships during WWII getting extra pay for being tailors while on duty. They had hand crank sewing machines like this one, which are popular now with some quilters.
Here is one my daughter gave me. I had to get the book for it and go through the timing to get it to work right, but it's a nice little portable.
Serial number says it was built in 1955.
/johnny