Hi Hen,
The link I posted to the Pontiac sign is from a seller in India. There are several more 42" Pontiac "wave" signs on ebay from India as well. I've notice many eBay sellers buying the foreign made junk and reselling it....just having a US address gives it a little more credibility I guess. I'm sure we will see outlets, such as CL, being used to mask the true origin for this garbage.
IMHO I think your "US made" sign for Hood Tire is also Indian made. There are differences between the two signs you linked, biggest being color.
Again I am not an expert, just calling it as I see it!