Block of (6) 50 Cents. Second Issue Experimental Face Notes. PCGS Currency About New 53.Uniface, printed on fine white bond paper. Standard size notes and design, overall 136mm by 156mm. As above, the face design as issued with March 5, 1863 enactment date above imprint. Imprint within the frame line, "Engraved and Printed at the Treasury Department", reverse white text on black rectangle. All face details present including the key. Washington cartouche engraved. Without bronze oval as used on issued notes. Not canceled in any manner. Style similar to Milton 2E50F.4, but on bond paper. Slightly off-white and rather fine bond paper. The impressions of this two wide by three deep block are stunning with deep embossing to the back. There is a wide top margin and no notations on either side. There are very light vertical folds, but the face appearance is that of Gem. These look like proofs at first glance, and as such are quite an eyeful. We first sold this block of six notes for over $2,500 in our 2007 Ford sale. Over the past several years we have seen a few of these individual notes, at the Extremely Fine and About Uncirculated grade levels, sell for around $1,000 each.