Perkins, Bacon - the Company and its Work
C. G. Harman, RDP, FRPSL President
Appendix D
The Periods of Use of Different Perforations for Postage Stamps printed by Perkins, Bacon or from Perkins, Bacon plates
| Perforation | Country and Comments | Period of Use |
|---|---|---|
| Comb Perf. 16 | Great Britain | 1854 February to 1857 July |
| Comb Perf. 14 | Great Britain Colonial work |
1855 January onwards Occasional use 1859 onwards |
| Perforation | Country and Comments | Period of Use |
|---|---|---|
| Imperforate | Great Britain and most overseas contracts | 1840 to 1860 June |
| Pin Perf. 12½ | Trinidad, Barbados |
1859 June |
| Pin Perf. 13½-14 | Trinidad, Barbados | 1859 June |
| Line Perf 14-16 | "A" Machine Clean cut perf. Electric Telegraph Company, Trinidad, Queensland, Bahamas, Barbados, Ceylon, Western Australia Intermediate perf. Many Colonies Rough perf. Most Colonies "A" Machine repaired Barbados, Grenada, St. Vincent, Turks Islands |
1860 June to early 1861 1860 late to early 1861 1861 April onwards 1872 late |
| Line Perf. 11-12 | "B" Machine St. Vincent, Turks Islands plus some trial printings |
1862 June onwards |
| Compound | "B" Machine x "A" Machine Barbados, St. Vincent, Turks Islands |
Occasional |
| Line Perf. 14¼ | Grenada Postage and Revenues only | 1881 April - one delivery only |
| Perforation | Country and Comments | Period of Use |
|---|---|---|
| Imperforate | St. Helena, Cape of Good Hope | 1862 to 1864 |
| Line Perf. 11½-12 | Bahamas, Trinidad, Ceylon | 1862 to 1863 |
| Line Perf. 11 | Bahamas, Trinidad | 1862 to 1863 |
| Line Perf. 13 | Bahamas, Barbados, Ceylon, Natal, Trinidad, Western Australia | 1863 to 1864 |
| Line Perf. 12½ | Most Colonies | 1863 to 1876 |
| Line Perf. 14 | Most Colonies | From 1876 |
| Compound | Line perf. 12½ x 14 - Barbados, St. Helena, Trinidad | Occasional |
| Line Perf. 12 | Occasional use for several Colonies | From 1882 |
| Comb Perf. 14 | St. Vincent | From 1882 |
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