It was advertised as Temco, but I didn't notice a supplier name on the order. They could have been selling it from a huge spool in a warehouse for a lower price. It's good wire, so I got my money's worth.
I went back and looked at the 2014 Amazon order. Clicking the item on the past order shows the item on a Temco spool and the page shows it to be sold and shipped by Temco. I guess they were out of spools and someone went to the warehouse and clipped off 100' and put it in a bag in an envelope and shipped it!
That's really weird Temco did that. But it was 3 years ago so who knows how they were packaging back then. Given they sell 1000' foot rolls, and even by the pound