I purchased an A- and it had two dot marks on the back and three vertical lines down the back...
I hope this will be a reference for others to purchase.
★★★★★ [Recommended seller].
From purchase to shipping, the transaction was handled promptly and without inconvenience.
The packaging was also very careful and anti-water and anti-fold measures,
The cards are in good condition, so we recommend this seller.
Thank you very much for your business.