What's Growing?

We have two citrus trees next to our house. One is a lemon tree I bought in a store, but I don't remember any lemons ever growing on it. The other may be an orange tree. One of our sons brought home a seedling, he found on a hike in the south of Israel and then planted it. We never really got anything edible from that one either. Both trees have been growing  in our garden for over twenty years.

To be perfectly honest, I can't remember which is which. They are about the same size and grow side by side, near where we have the clotheslines.

A few days ago, I noticed some fruit tucked into the leaves of one of the trees. Maybe we'll get to eat the fruit of the tree later on. And maybe we won't. We'd need quite a ladder to reach high up and inside.

What do you think? Any citrus experts out there?