I didn't want to start a new thread about this, so I just bumped an old one. I recently purchased this card from joesvintagesporstcards on eBay and from what I can tell and have read here, it appears to have a printer's mark similar to the OP's.
My question is, does the mark add any premium to the card? It's the first horizontal T206 that I've owned and I clicked the BIN immediately after I saw the printer's mark. Paid $70 which I think is pretty good.