Size of engraving 41 x 60mm. Design the same as for the first one cent stamp excepting that it is larger and the colorless circular band is inscribed “Allcock’s” above and “Porous Plaster.” below, in colored, Roman capitals. There is a small, colored, five-pointed star between these inscriptions at sides.
It was at first intended that this stamp should be identical with its smaller predecessor except in the matter of size. The Bureau, however, refused to approve the model so long as it bore the inscription “United States Certificate of Genuineness.” The next proposition was to insert “Guaranteed Genuine”, but this also failed to obtain the approval of the Bureau and ** Allcock’s Porous Plaster.” was finally substituted and approved.
On Jan. 9, 1875, Mr. Brandreth wrote to Mr. Carpenter as follows : “We intend using the small stamp (the one we have been using) for the fills and the large one for the plasters.” And, on March 6, 1875, he wrote: “The large one is inconvenient to handle and does not look well on the goods.” One lot of this stamp was ever ordered.
An Historical Reference List of the Revenue Stamps of the United Stamps: Including the Private Die Proprietary Stamps
Boston Philatelic Society
Salem, Press of Newcomb & Gauss, 1899