Ditunjukkan sekarang: San Marino - Setem-setem bayaran pos (1920 - 1929) - 13 Setem-setem.
30. May WM: 1 Perforasi: 14
26. July WM: Tiada Saiz Helaian: 50 Ukiran: Officina Calcografica Italiana - Roma Perforasi: 12
6. August WM: 1 Saiz Helaian: 50 Perforasi: 14
11. August WM: 1 Saiz Helaian: 50 Perforasi: 14
20. September WM: 1 Perforasi: 14
| No. | Jenis | D | Warna | Deskripsi |
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| 91 | AC | 5+5 C | zaitun | (90000) | 0.58 | - | 0.29 | - | USD |
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| 92 | AC1 | 10+5 C | oren | (80010) | 0.58 | - | 0.29 | - | USD |
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| 93 | AC2 | 15+5 C | hijau gelap | (80010) | 0.58 | - | 0.29 | - | USD |
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| 94 | AC3 | 25+5 C | merah tua | (80010) | 1.74 | - | 0.58 | - | USD |
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| 95 | AC4 | 40+5 C | coklat ungu | (60030) | 6.94 | - | 2.31 | - | USD |
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| 96 | AC5 | 50+5 C | kelabu | (100080) | 4.63 | - | 0.29 | - | USD |
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| 97 | AD | 1+5 L/C | hitam/biru | (60120) | 17.35 | - | 4.63 | - | USD |
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| 98 | AE | 60+5 C | merah tua | Express stamp | (70014) | 6.94 | - | 1.16 | - | USD |
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| 91‑98 | 39.34 | - | 9.84 | - | USD |
29. September WM: 1 Saiz Helaian: 50 Perforasi: 14
