Digging through a box I got at a show and I found half a dozen of these "errors" from some collectors group. I am curious if these seem to have any value but I don't know where to look. Here are a couple samples. (Please contact me directly with all bids over $10,000

The error here is pretty obvious. Also a non perf variety?

The error on this stamp is that they were imperf and printed in only one color? Stamp was from 1909?
