Select Date of Issue:
| 1918 (Spanish) Jan 2 9 16 23 30 | 1918 (English) Jan 2 9 16 23 30 |
| 1918 (Spanish) Feb 6 13 20 27 | 1918 (English) Feb 6 13 20 27 |
| 1918 (Spanish) Mar 6 13 20 27 | 1918 (English) Mar 6 13 20 27 |
| 1918 (Spanish) Apr 3 10 17 24 | 1918 (English) Apr 3 10 17 24 |
| 1918 (Spanish) May 1 8 15 22 29 | 1918 (English) May 1 8 15 22 29 |
| 1918 (Spanish) Jun 5 12 19 26 | 1918 (English) Jun 5 12 19 26 |
| 1918 (Spanish) Jul 3 10 17 24 31 | 1918 (English) Jul 3 10 17 24 31 |
| 1918 (Spanish) Aug 7 14 21 28 | 1918 (English) Aug 7 14 21 28 |
| 1918 (Spanish) Sep 4 11 18 25 | 1918 (English) Sep 4 11 18 25 |
| 1918 (Spanish) Oct 2 9 16 23 30 | 1918 (English) Oct 2 9 16 23 30 |
| 1918 (Spanish) Nov 6 13 20 27 | 1918 (English) Nov 6 13 20 27 |
| 1918 (Spanish) Dec 4 11 18 25 | 1918 (English) Dec 4 11 18 25 |
| 1918 (Spanish) Indices Jan to Mar Apr to Jun | 1918 (English) Indices Apr to Jun Jul to Sep Annual Annual |