Help !! Byrd Antarctic Expositions

"Are there any with Byrd's signature around?";

Yes there are. Byrd was a prolific and kind signer of his autograph so there is a decent amount of surviving Byrd sheets and even single stamps with his signature. In fact, just today someone asked me to authenticate a Byrd signature on a 735 sheet (ironic!). Unfortunately, his original signature was very light so someone re-traced it to make it darker - thus basically ruining the collectible value of it!

Thanks bill. I thought I just saw one on Stamps2Go but I'm not sure and couldn't find it. I'm sure it would fetch a good price.