Fantastic work and a great picture!

At the time a lot of auto parts sold a lot of other items such as radios and TV's, and United Service distributed them, similar to Firestone and Western Auto. I suppose Delco thought some of their dealers would get into repair and ordered up a batch of 5AXP4's to distribute to them.

I found a 1950 Billboard article that said Delco executives were looking at getting into making their own sets instead of re-branding others. Obviously, they decided not to. It does seem that it might have worked if they had combined them with Fridgidaire appliances.