Portugal, silver coin of Cruzado Novo silver 1811 D. João Prince Regent, silver coin of 480 Reis year 1811 of the reign of D. João Prince Regent, tall crown, diadem 2 points, on the reverse, the quatrefoils surrounding the cross of the Order of Christ with the petals cloused, World Coins Portugal KM#331. Coin minted during the reign of D. João Prince Regent (1799-1816), born in Queluz on May 13, 1767, son of D. Maria I and D. Pedro III. Due to the illness of the Queen Mother, Prince D. João took on the responsibility of government from 10 February 1792, assuming it definitively as Prince Regent from 15 July 1799, until the death of his mother.

Rare copper coin of 1/4 Macuta 1814 of D. João Príncipe Regente, Angola, Africa Portuguese former colony of Angola, World Coins Angola KM#44

Rare copper coin of 1/2 Macuta 1814 of D. João Príncipe Regente, Portuguese former colony of Angola,  World Coins Angola KM#45

Angola coin of 2 Macutas 1815 copper D. João Príncipe Regente, Recoined on 1 Macuta of D. José I, World Coins Angola KM#47

Brasil, Silver coin of 150 Réis 1754 of D. José I (Portugal), Shield countermark of 1809, legend error, "ATAN NGIS". Coin of 150 Réis 1754 Silver D. José I (Brazil) Series J, "R". Rio Janeiro, with "Shield" countermark of D. João Príncipe Regente (1809),  error variant in the legend "ATAN NGIS"

Brazil copper coin of 40 Réis 1816 D. João Prince Regent, "B" Bahia, Crown without peduncles, circle 58 Pearls, World Coins KM#234.

Silver 960 réis coin, known as the Patacão, issued in 1810 for colonial Brazil under Prince Regent D. João. Struck at the Rio de Janeiro Mint (“R”), this VF+ example shows characteristics typical of overstruck pieces and is valued for its historical relevance and importance within Luso‑Brazilian numismatics.

Coin from Brazil (former Portuguese colony), featuring the "Escudete" countermark of Prince Regent D. João on a 1774 XX Réis copper coin of D. José I (Brazil), as catalogued in World Coins Brazil KM 175.1. This example has a High Crown with a Potent Cross featuring a filled design similar to a Cross Pattée. Legislation: Royal Charter of April 18, 1809. Following the French invasion of Portugal and the subsequent transfer of the Portuguese court to Brazil, the Prince Regent ordered, as a means to cover expenses and due to the scarcity of circulating currency, that earlier Brazilian coins from previous reigns be countermarked with the "Escudete" on both copper and silver coins. For copper coins, this countermark doubled their face value, effectively increasing their legal tender value twofold.

India copper coin of 6 Réis of Prince Regent D. João (1799-1816), World Coins India Portuguese KM 211