Unusual Motion Lamp with "Table Lamp" Top Fixture

This motion lamp is 26" high from the ground to the finial. The lower section is a regular motion lamp - I'm told it's "Chicago Fire" by Goodman, from the 1950s - with a slightly different base than normal. The odd part is the top fixture which adapts the light into a full-size table lamp. I have never seen one before and I cannot find any references on Google. The switch allows the lamp to be lit with the bottom only, top only, and both at once. Any info appreciated.