I seem to be good at finding these and the odd thing is, this is the same flea market I rarely go to where I found the last two shovels. This one was $5.
No markings that I can find, the blade is pretty rusty.
https://www.milsurps.com/images/impo.../GxW3B4F-1.jpg
https://www.milsurps.com/images/impo.../AFEgCtn-1.jpg
https://www.milsurps.com/images/impo.../2dWPCRQ-1.jpg
https://www.milsurps.com/images/impo.../f9ToWpc-1.jpg