Vintage beach voyeur shot of my mom?

[signore]

Hello,
I did not frequent this site for a long time, so I may reintroduce myself, European, 50 years old. Recently, I was looking for vintage beach voyeur photos and I found this one, it left me speechless, I am to 99,9% sure this is my mother,though I did not know she was into nudism. I did the usual research, but did not find anything. So I ended up right here, looking for help. The photo was probably taken in the 70th, maybe in Greece, on an island. I do not know who the photographer was, but it ended on the internet. Now I really would appreciate any information about this voyeur-shot of her. I would be so glad to find out there are more photos of her.
I will appreciate any comment, any information you might give to me.