The reflector give the illusion of a pillow or something behind the lamp. These older reflectors are so basic yet they seem to distribute light so much better than today's lights. Mainly because older lights use the refractor to distribute the light.
I just noticed that Kinda cool. The reflector looks very similar to a model 13, 113, or 115 reflector. It may even be the same. I'll have to compare this side by side with my 113.