↑The Wikipedia template uses a yearly average inflation. Using monthly averages gives slightly different numbers, most significantly for items sold early or late in a year with significant inflation.
↑Value derived from exchange with Inverted Jenny block of four, bought in the same year (2005) for $2,970,000.[11]
↑The stamp was sold on May 22, 2010 for an undisclosed price higher than the 1996 price of $2.3 million USD, to Armand Rousso.[12][13]
References
12"The British Guiana 1-Cent Magenta Stamp". Sotheby's. 2013-09-14. Archived from the original on 2020-05-11. Retrieved 2020-07-04.
12Brown, Robin (2014-06-18). "Du Pont stamp sells for $9.5 million". delawareonline. Archived from the original on 2018-08-29. Retrieved 2020-07-04.
↑"BIG SPENDER:百年郵蹤"[Big Spender: Hundred-Year Trail of Philately]. Apple Daily 蘋果日報 (in Chinese). 2013-08-22. Archived from the original on 2019-12-28. Retrieved 2020-07-05.
↑"Record result for the Mauritius Ball Cover". 2021-06-21. Archived from the original on 2022-11-28. Retrieved 2023-01-17.
↑エステル・ルクレール (2023-06-03). 「日本の切手が世界記録となる540万ユーロで落札」 . David Feldman SA . 2023-07-15閲覧。
↑ "ロット30070 - 1871年、500モン、灰黄緑色、最古の印刷、プレート1、位置8中央反転 | 2023年6月1日~3日 ラテンアメリカ、エジプト、日本 | David Feldman SA David Feldman SA"。David Feldman SA 。 2023年7月15日取得。
1 2 Schmid, Randolph E. (2006-05-25). "希少で高価な切手が展示される" . Washington Post . 2018-10-03 のオリジナルからアーカイブ済み. 2020-07-05に取得.