In 1875, the Internal revenue department issued a 2-cent revenue, depicting an allegory of Liberty. Printing of this issue continued into 1878. This was the first U.S. Revenue stamp to be issued that did not bear the portrait of George Washington. The Liberty issue was printed on silk bluish paper. Two types of perforations were added, standard perforations with punctured holes, and rouletted. Stamps produced in 1878 were printed on double-lined watermarked paper. Quantities printed for this issue were great, totaling 228,351,689 stamps, which include both standard and rouletted perforations. The quantities of stamps issued with each type of perforation are not known.