Erte Triptych? & 3 large Erte prints w/o signature?

I saw these Erte prints while at my favorite thrift store today, but none have the Erte signature?
The triptych print on the left has the following on the bottom left edge -
MC 7931 Erte 'Emerald Eyes', but none have hos signature, just like the 3 seperate prints.
The 3 seperate prints measure 15 x 20 (just artwork) / 24 x 29 (w/frame) - I bought those, but waited on the triptych because I didn't see any when I googled Erte triptych + I wanted to see what this forum thought of it?
They're asking $100 for the triptych and I paid $25 each for the single prints with matching frames.
Thoughts on triptych?
Thoughts on the 3 I purchased?
As always, I appreciate your help & insight!

 

In the 80s, Ertè prints were white hot popular. My guess is these are prints of said prints.