I've dealt with 3 types of eczema and as rashida mentioned it doesn't look like eczema to me. Also the fact that it isn't painful and doesn't itch, common symptoms of eczema makes me doubt the eczema diagnosis.
If you were told it was eczema, don't just settle for a doctor identifying it as eczema without a specific eczema diagnosis as there are a dozen eczema types and many are treated differently. If your doctor told you that it was cancer, wouldn't you ask for the type of cancer?
It looks nothing like any of my types: Grover's Disease or Perioral or even the Allergic Contact Dermatitis when they were active.
If your papules were clustered, itchy, painful and more rash like I would suggest the 5 Day Extended Patch Test to identify allergic contacts.
What you should do is keep searching, go to dermnetnz.org and look though their skin site at their collection of photos for each type of eczema and all other skin diseases. In fact, that is how I identified my Perioral Dermatitis which my doctors were treating incorrectly as Allergic Contact Dermatitis.