The guts of old Austrian lampholders (until ca 1950ies I guess) looked exactly like their new American counterparts (screwshell simply used as neutral, made of one piece).
A porcelaine ring was screwed on the outside of the screwshell kept the screwshell from making contact with the metal casing and covered any protuding parts of the bulb's thread. I like those light sockets, simply because they look nice (all brass with the white porcelaine ring, sometimes with a porcelaine knobturn switch), and are almost everlasting.
