Muri Bhalissa: L-Olanda - Bolol tal-posta (1930 - 1939) - 10 bolol.
1. May WM: Xejn Disinn: Samuel Louis (Sem) Hartz. Inċiżjoni: Joh. Enschedé. Perforazzjoni: 12½ x 12
| Le. | Tip | D | Kulur | Deskrizzjoni |
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| 291 | DN | 1½+(1½) C | sepja | Heike Kamerlingh Onnes; Physics 1913 | (706.210) | 2.35 | - | 1.17 | - | USD |
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| 292 | DO | 5+(3) C | aħdar skur | Aritius Sybrandus Talma | (583.708) | 14.09 | - | 3.52 | - | USD |
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| 293 | DP | 6+(4) C | aħmar | Herman Schaepman | (1.045.031) | 11.74 | - | 0.59 | - | USD |
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| 294 | DQ | 12½+(3½) C | blu | Desiderius Erasmus | (438.831) | 46.96 | - | 3.52 | - | USD |
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| 291‑294 | 75.14 | - | 8.80 | - | USD |
15. May WM: 2 Disinn: Pijke Koch Inċiżjoni: Stampatore: Joh Enschedé Security Printers Perforazzjoni: 12½
1. December WM: 2 Disinn: Joop Sjollema. Inċiżjoni: Joh. Enschedé. Perforazzjoni: 14¼ x 13¼
