Seeing @dirty_brian 's lovely Gran Colombia 8 reales reminded me I have one from this decade as well. I got it for the MDQ (Moneda de Quito) countermark, which I think made it legal for circulation in newly-independent Ecuador. I think the countermark is from ~1832. Colombia, 1821, 8 reales, "MDQ" countermark
Ottoman Empire AV 1/2 Surre Altin AH1223/16 (1822/23) Kostantiniye Mint Mahmud II 1808-39 Ottoman Empire AV New Adli Altin AH1223/18 (1824/25) Kostantiniye Mint Mahmud II
Ottoman Empire/ Algeria AV Sultani AH1240 (1824/25) Jazair Mint Sultan Mahmud II 1808-39 Turkish issues from Algeria are very rare
Ottoman Empire/ Egypt AV 1/2 Hayriye Altin NOT 1/2 Zeri Mahbub AH 1223/22 (1828/9) Misr Mint (Cairo) Mahmud II 1808-3
Mexico, 8 reales, Ferdinand VII, 1821 CG, Durango. KM 111.2 26.8 grams Brazil, 960 reis, 1824, Bahia, struck over a Potosi 8 reales, Ferdinand VII, 1822 PJ (KM 84). KM 368.2 26.98 grams
Portugal AV 4 Escudos 1826 Lisboa Mint Pedro IV 1826-28 Pedro IV would abdicate throne and become Emperor of Brazil/ which became independent from Portuguese r ule in 1828.
I once posted a 1740s coin/ in the 1640s decade. After working 14 hours today in 35 celsius heat/ my brain got fried a bit.
One I forgot to post from 1800-09 decade Great Britain AV Half Guinea 1804 London Mint George III (sixth bust) 1760-1820