On the front of the base
This is a Doorstop Lamp and not a true Doorstop
This piece has a stem between the dogs that socket & bulb is mounted.
Instead of the usual U-Grove on the doorstop lamp back
that the stem for the socket is mounted.
For more information about Doorstop Lamps
See "1. DOORSTOP, LAMP or BOOKEND ?"
Under the DOORSTOP KNOWLEDGE
icon on the HOME PAGE of this site
This lamp version is different from the others in that
the lamp stem is not a separate attachment mounted
on a backside protrusion.
The scotties has the stem cast in the doorstop design itself.