Afflicted tomato leaves

[JLJ_]

Can you tell by their appearance what is the most likely cause of the spots on these leaves? I'm familiar with many of the good tomato illness diagnostic aid sites, (including the "sticky" threads above), and have a guess about what it might be, but I am fortunate enough to have very little real experience with sick tomatoes -- due to an interaction of location and varieties grown, so wondered what those who often saw "real life" tomato disease thought -- though I realize this is limited information for diagnosis.

It didn't have a real impact -- fruit available before snow was OK, though this did spread rapidly over the leaves of the plants of this variety. The practical reason I'm interested is that the adjacent Marglobe and Break O'Day plants were not affected, but this variety was -- and has been my only afflicted variety, though with an apparently different affliction, on other occasions.