Latvia Interwar Cinderella

I found these four in an older collection. They are all very faded, I assume, rather than being produced in this manner, and are quite crude in appearance though they have a resemblance to existing designs. Three have the word "Walmeera" stamped over the design and the fourth has the word "Rauna" stamped on the face. All four have the letters "F.S." stamped in purplish ink on the reverse in the lower left corner. I will try to add another scan showing these but my first attempt did not show the colour well.

Has anyone run across these before? Is there a story connected to them? I would love to know.

Bogus issues,according to Evert Klaseboer

Thanks for the reference. Always good to know what these strays are .... and aren't.