Hofert's has been making Christmas type lights since the 1880's and still do according to their website.
This set is probably from the late 1950's based on the original price tag.
These are a parallel set of 25 indoor/outdoor multi color lights in original box.
Tested works.

We do accept returns, all items are shipped with a security seal & SN are recorded items with seal broken or removed will not be accepted for return

049911212023GW