Featured Found 3 David Alfaro Siqueiros Prints Dated 1950s & 1960s but Unsigned Have Value?

Bought these today for $20 each - they are on paper which is on unusual webbing? in what looks like the correct era frames?
I found that Siqueiros is called one of Mexico's most important artists& some of his signed lithos on Japanese paper have sold on eBay for good money.
Are these anything special? The Japanese like netting the paper is on + the zebra looking backing makes me wonder!
What is the unusual backing (seen in last photo where paper backing is torn)
Thanks I appreciate any help!

 

The first work is titled Caminantes, the second El Beso, the third Mujeres del Mezquital. Apparently Siqueiros is much reproduced. Think you may have to remove one from frame to see exactly what you have/don't have. Given the inexpensive matting and framing, don't look promising to my eye.

Debora

 

Thanks Deborah - think I'll leave as is & put as a group auction on eBay

 

I'm with Debora. It isn't likely they would be framed like this if they were originals and real. Very powerful work though, his murals are also impressive.

 

They are powerful - they were hanging on a wall in a group & they drew me right to them

 

Love him too but open edition signed IN the plate 20th century prints are of decorative value only IMO as they were made for volume distribution.