I bought three U.S. 1st Bureau Issue stamps on Jan 25 and submitted them for certification due to their age. It's a good thing I did. ALL were mis-described and one was definitely altered. Here are the APEX results.

==========================
"APEX has returned the item(s) you submitted for expertizing during your StampStore purchase; the results are as follows:
· Described by the seller as US Scott Number 283, unused, NH - APEX Cert #228443 returned indicating - United States Scott No. 283a, vertical watermark, unused, genuine, regummed, cleaned, color altered.
· Described by the seller as US Scott Number 284, unused, NH - APEX Cert #228442 returned indicating - United States Scott No. 284, unused, previously hinged, original gum, genuine in all respects.
· Described by the seller as US Scott Number 282c, unused, NH - APEX Cert #228441 returned indicating - United States Scott No. 283, Type II, horizontal watermark, unused, previously hinged at gum side top left, original gum, genuine, sulphurized color.
As all three items are misdescribed, we assume you wish a full refund of the items and expertizing fee? Please let me know as soon as possible so that we may either mail or process a refund."
=====================================
This is the second time this has happened with expensive stamps purchased through the store. Apparently there is little or no oversight regarding the accuracy of the sellers' descriptions by APS. There is however excellent customer service by APS. I was notified promptly of the bad results and offered a full refund.
I think I'll shop elsewhere in the future or else buy only APEX certified issues. I don't have a lot of confidence in the sellers' descriptions.