Muri Bhalissa: L-Olanda - Bolol tal-posta (1930 - 1939) - 12 bolol.
1. April WM: 2 Disinn: Pijke Koch. Inċiżjoni: Joh. Enschedé. Perforazzjoni: 14¼ x 13¼
1. June WM: Xejn Disinn: Samuel Louis (Sem) Hartz. Inċiżjoni: Joh. Enschedé. Perforazzjoni: 12½ x 12
| Le. | Tip | D | Kulur | Deskrizzjoni |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 304 | DX | 1½+(1½) C | sepja | Jacob Maris | (703.484) | 1.17 | - | 0.59 | - | USD |
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| 305 | DY | 5+(3) C | aħdar | Franciscus Sylvius | (551.574) | 11.74 | - | 3.52 | - | USD |
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| 306 | DZ | 6+(4) C | vjola | Joost van den Vondel | (1.036.794) | 3.52 | - | 0.59 | - | USD |
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| 307 | EA | 12½+(3½) C | blu | Anton van Leeuwenhoek | (500.700) | 29.35 | - | 1.76 | - | USD |
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| 304‑307 | 45.78 | - | 6.46 | - | USD |
1. December WM: 2 Disinn: Jan van Krimpen y Pijke Koch. Inċiżjoni: Joh. Enschedé. Perforazzjoni: 14¼ x 13¼
| Le. | Tip | D | Kulur | Deskrizzjoni |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 308 | EB | 1½+(1½) C | griż | (2.047.983) | 0.29 | - | 0.29 | - | USD |
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| 309 | EB1 | 3+(2) C | aħdar | (905.268) | 4.70 | - | 1.17 | - | USD |
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| 310 | EB2 | 4+(2) C | kannella ħamrani | (1.057.635) | 3.52 | - | 0.29 | - | USD |
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| 311 | EB3 | 5+(3) C | aħdar blu | (2.583.665) | 3.52 | - | 0.29 | - | USD |
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| 312 | EB4 | 12½+(3½) C | blu | (825.268) | 29.35 | - | 1.76 | - | USD |
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| 308‑312 | 41.38 | - | 3.80 | - | USD |
