During the span from 1855 to 1859, two different plates were produced for the 10¢ stamp. Each plate produced a sheet of stamps consisting of 2 Panes of 100 stamps, 10 stamps across by 10 stamps down, a left side and a right side with a centerline dividing them. Plate 1 was in use from May of 1855 until May of 1859, while plate 2 was used from late May of 1859 until demonitization in 1861. In order to be able to determine one must understand the differences in these two plates.
This relief shows incomplete designs at both the top and the bottom of the stamp. This relief (when no re-entry occurred) resulted in the stamp being a Type III or Scott #15.
In 8 positions of the total 200 stamps on the plate, re-entries were made at either the top, bottom or in 1 case, both top and bottom of the plate. These 8 re-entries are known as Type IV 10¢ stamps and are designated as Scott #16. They are the most rare of the 10¢ stamps. The full plate is shown below (click the image to enlarge):
Scott # 13 – Type I – 20 stamps = 10% of stamps
Scott # 14 – Type II – 93 stamps = 46.5% of stamps
Scott # 15 – Type III – 79 stamps = 39.5% of stamps
Scott # 16 – Type IV – 8 stamps = 4% of stamps
In 1857, while still using plate #1 to produce the 10¢ stamps, the government informed Toppan, Casilear, Carpenter & Co. that they wished U.S. stamps to be perforated prior to their distribution to post offices. The perforating of complete sheets made from this existing plate resulted in the production of all new stamps (as considered by collectors). Thus, Types I, II, III & IV which prior to perforation were Scott #âs 13, 14, 15 & 16 respectively, now became Scott #âs 31, 32, 33 & 34. The only difference between Scott # 13 and Scott # 31 is the presence of perforations. The same holds true for the other Scott #s respective of their counterparts.
Above is an envelope with a block of 6 of the 10¢ perforated stamps of 1857. The plate positions of these stamps correspond to 74-75L1 to 94-95L1. Thus, this multiple contains all 4 types of the 10¢ stamp used on cover. The 60¢ paid for the double Prussian Closed mail rate from Pine Lakes Wisconsin to Germany on December 2, 1858.
The Swedish Tiger’s US Stamp Site Illustrated Guide
Siegel Encyclopedia (1857-60 Issue)
Civil War Timeline, at Siegel Encyclopedia