Wondering if these are syroco mirrors, no marking and have a heavy paper/cardboard back. They are plastic frames, and were taken out of a vintage farm house near my hometown. Guessing 1960s (??) Trying to determine value....
Not Syroco..... As you said, plastic. Probably later than the 60s. Decorative value only. Used to sell similar mirrors for under $25.00 for good sized ones. Much less for small ones.