Looking at the cards my first thought was that they were possibly (and mostly) trimmed...a good portion of them look small and just too perfect. I have a Willetts that also has an angular cut and nice corners, but you can see that mine has substantially, and probably unnaturally, larger borders.
t206willettbattingP350 001 (353x640).jpgt206willettbattingP350back 001 (364x640).jpg
I could be completely wrong about all this. From my perspective the fact that they came from Teletrade made no difference, as I purchased from them and did not have any trimming issues. However, I was/am into lower condition cards, so something like these real nice looking examples would never have been something I went after (My Willetts probably came in a group lot).
It would be nice to know what T206'ers have to say about them. And I appreciate a seller looking out for their customers...kudos!
Brian