An oldie but a goody from the early 90's, Miss Vicky Little who was in the British rag Parade back then. 
Yes, they are prosthetics. 
I have that set and some others similar on hard drives somewhere
I don't remember when they were new hehe, I found them as retro postings on a website. I mean I was alive when they were new, but I was fairly young, naive, and sheltered
so I didn't find them till much later on
At the time my BE fetish was just kinda hitting it's full stride, and I was not at that time any good at morphs, and Mast asia wasn't quite around yet. So I was very enthralled with her pics
I remember thinking they were ridiculous
but... also inescapably erotic. They fueled quite a number of self-improvement themed "bedtime alonesies" fantasies.