The use of the grille was finally abandoned altogether. The first notice of this change appeared in the stamp papers of February, 1873. They were made by the same company, and are in all respects the same, except the embossing. 1 cent, imperial ultramarine, perforated 12. 2 cents, velvet brown " " 3 " milori green " " 6 " cochineal " " 7 " vermilion " " 10 " chocolate " " 12 " purple " " 15 " orange " " 24 " pure purple " " 30 " black " " 90 " carmine " " The colors do not vary materially from those of the grilled series, but there are two quite distinct shades of the twelve cents, a blackish purple and a brownish tint. ISSUE OF 1873. In accordance with the provisions of the general law, before the expiration of the contract with the National Bank Note Company, the Postmaster General advertised in the daily papers, in December, 1872, that he would receive bids for furnishing the Department with postage stamps from the 1st of May, 1873, to the 1st of May, 1877. This contract, as well as the subsequent one which terminated the 1st of July, 1881, was awarded to the Continental Bank Note Company, of New York. The dies and plates, by the terms of the contract with the National Bank Note Company, were the property of the Government, and were turned over to the new contractors, who continued to print the stamps from the same plates, until they were worn out, and theoretically in the same colors. As new plates were required from time to time, they were made from the original dies, but bore the imprint of the new contractor, which resembles the first one described as used by the National Company, but reads "Printed by the" in the first line, "Continental Bank Note Co., New York," in the second line. This imprint probably, was not put upon one of the values above 15 cents. In fact the 30 and 90 cents sent out just before, and for some years after the expiration of the second contract awarded to this Company, bore the second named imprint of the National Bank Note Company. Specimens are found which show the heavier border lines and shadows of the different parts of the design, the fine lines of the background, of the tablets, and sometimes of the shields, being invisible to the eye, though more or less of them can generally be traced with a glass. These collectors have designated as "plain frames," as they appear to be without color. They are, really, defective impressions either from worn plates, when the plates made by the National Bank Note Company, were giving out in 1873, or from the poor results of the process of printing adopted, as is claimed by the Postmaster General.