What size bulbs for an '86 GT foglights?

A good friend of mine has an '86 GT and he thinks the bulbs are 1057's, which him and I think is very strange. I thought they would have H3 bulbs. He thinks someone messed around with them before because it has another switch besides the stock one, for the fog lights in the interior.

What bulbs should it have?

I don't know if they are marchal lights, he said he has the covers for them but never put them on, I'll ask him if they are genuine lights...Thanks