It reminds me of Marchesa Boccella (aka Marquise Boccella and Jacques Cartier), which I used to grow. I'll put a photo link below:

Here is a link that might be useful: Marchesa Boccella photos

The flowers do look right. I couldn't find a good picture online of the stems for marchesa Boccella - are they as densely thorny as mine?

I grew one at our former home, so can't check, but if I remember correctly the stems were prickly all the way up to the bloom.

Since we haven't found stem photos to compare, maybe it would be productive to focus on the foliage. How do the leaves in the HelpMeFind photos compare to your rose?

Thanks for the suggestion. The stems are so prickly I forgot I could use other avenues.

In looking for terminology, I ran across a website that I'll link. Using it, I'd call my rose "doubly serrate" whereas the Marchesa Boccella pictures I've seen would be just serrate. The main difference is actually the size - my serrations are tiny - they don't even look like serrations in the pictures. The ones on Helpmefind are far more orderly.

I also discovered today that the prickles on the new foliage are flexible enough that as long as I'm moving my fingers up the stem instead of down they bend and I can grasp the stem. (One year old or older growth is an entirely different story!"

Happy 4th,

Mike

Here is a link that might be useful: leaf margins 1/4 way down

No, not Marchessa Bocella. On the picture from other UBS site it looks like it can be Common Moss or some other Moss rose. If you rub your fingers on the stem or bud and smell them, will you get piny smell?
Olga

I'll put a link below to the HelpMeFind listing for the Common Moss rose that Olga suggested (super-prickly!):

Here is a link that might be useful: Common Moss photos