Hammer and sickle of URSS flag
Preview:
*** UPDATE 4/2/2020 ***
Just a few days after my submission I found a CC0 image which contains the sovietic and communist hammer and sickle.
I believe you can obtain better results in your project using this one (obviously you can still use the images on this page):
https://openclipart.org/detail/318962/socialism-is-peace
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It was unexpectedly hard for me to find any CC0 image of the well known symbol of URSS and communism.
So I drew it myself, an unprofessional work but I suppose can be useful to somebody.
Software used: GIMP
Copyright/Attribution Notice:
Public domain. Give credit to "RikForFun" only if you are so kind to mention authors when attribution is not needed.
File(s):
sicklehammer.jpg 2.2 Kb [39 download(s)] sicklehammer.png 2.7 Kb [51 download(s)]
Comments
game-icons.net also has a vector one: https://game-icons.net/1x1/delapouite/hammer-sickle.html
...which is licensed by CC BY 3.0, while the unprofessional images in this page are CC0.
A subjective matter.
In several case, as when I intend to put the image on the margin of a scene, I prefer using public domain assets, if exist.
Sorry, you're right. I somehow overlooked that you were initially searching for a Public Domain one.
Don't mind. I figure somebody is going to prefer following your link than dowloading this images. ;-)