vintage Syracuse ironstone china, Glendale pattern restaurant ware covered bowls, soup or casseroles?

Set of four Glendale pattern Syracuse china covered bowls, heavy ironstone porcelain made for hotel or restaurant ware. Bowls are tall and deep, about 4" across the bowl rim.

These look as though they've been used as onion soup bowls, they have a little staining to the knobs on the lids which you might expect from oven use. No chips or cracks, and the bowls themselves have no discoloration.