Several possibilities ranging from just weather effects to pests to disease. All can produce symptoms that you describe. Would need to see the fruit to possibly narrow it down.

Dave

Hi, I have had the same problem with tough skins tough and not shiny skins,my seed were exhibition seeds [ Vandos ] from a reputable seed merchant,i have had vandos for the last 3 years and never had a problem with them.

Wrong picture?

Linda

LOL! Maybe the tough skin isn't on the tomato. ;)

It is easy to get skin off.
Drop them in boiling water fir 15 seconds, take them out put in ice water . then peel them the skin will peel off real asy. I do this for cooking and sometimes for slicing. Tomato skin(thin or thick) is indigestible. So are the seeds.