| 41. | In June 2007 Canada Post featured Mitchell on a postage stamp.
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| 42. | Postage stamps have facilitated the delivery of mail since the 1840s.
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| 43. | The postage stamp was reprinted in 1999 and reissued in 2000.
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| 44. | Most aerograms have an imprinted stamp indicating the prepayment of postage.
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| 45. | In 2015 Canada Post placed her image on a postage stamp.
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| 46. | In January 2004, Bower was featured on a postage stamp.
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| 47. | He was commemorated on a Polish postage stamp issued in 1978.
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| 48. | Governments have sometimes combined the functions of postage and revenue stamps.
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| 49. | A postage stamp was also published to pay respect to him.
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| 50. | Shape-based postage pricing is a form of dimensional weight.
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