Older pieces didn't have a "attached" base/drain bowl. That is a "newer" invention.
My grandmother was a member of a very active garden club for over 50+ years...and she had quite a few orchid bowls...all shapes, sizes, colors, origins, etc.
That's where I have seen similar!
Also, back in the late 70's there were several companies that sold pots - touting that you can grow many plants without soil - using aerated pots and lava rock.