Circulating coin

What these coins tell us a few, from the oldest to the most recent

1. 1750
   Escalin de Marie-Thérèse au lion du Brabant (1749-1750)Austrian Netherlands escalin 1750 - Marie Thérèse - Main
2. 1858
   Série de 2½ gulden de Guillaume III (1849-1874)Netherlands, 2½ gulden, William III, 1858
3. 1887
   Série de 2 lires d'Humbert Ier (1881-1899)Italy - 2 lire 1887 R - Umberto I
4. 1912
   Série de 50 centimes d'Albert Ier (1910-1914)50 centimes - Albert I in French
5. 1935
   Série de 20 francs de Léopold III (1934-1935)Belgium 20 francs 1935
6. 1950
   Série de 20 francs au type Mercure (1949-1955)Belgium 20 francs - Prince Charles - “Mercury” type in French 1950 - ↑↑
7. 1969
   First 50 new pence coin of Guernsey (1969)Guernsey 50 new pence 1969 - Ducal hat of Normandy
8. 1990
   First year of the Irish 1-pound coin (1990)Ireland 1 pound 1990 - Red Deer - Beautiful Proof

By decade

All coins 219 coins, from the oldest to the most recent

19132 Korona - Francis Joseph I 1913Netherlands 25 Cents - Queen Wilhelmina - 1913 1914Guernsey 2 doubles 1914 - Coat of Arms 1914Mexico 50 centavos 1914 M 1914Netherlands 1 gulden 1914 1914Netherlands 10 Cents - Wilhelmina - 1914 1915Italy - 1915 1-lire R - Victor Emmanuel III 1915United Kingdom 1 Penny 1915 1916Denmark 25 öre Christian X 1916 ♥ VBP 1916Italy - 2 lire 1916 R - Vittorio Emanuelle III 1917Canada 5 cents - George V 1917 1919Canada 50 cents - Newfoundland 1919 C 1919Denmark 10 öre Christian X 1919 ♥ HCN 1927Italy - 5 lires 1927 R - Vittorio Emanuele III 1927United Kingdom 1 Penny 1927 1928Ireland 1 shilling 1928-Proof 1928Ireland 6 pence 1928 - Irish Free State - Irish Wolfhound 1929Guernsey 1 double 1929 - Coat of arms 1929Luxembourg 10 francs 1929 1929Luxembourg 5 francs 1929 1929Netherlands ½ gulden - Queen Wilhelmina - 1929 1929United Kingdom 1 Penny 1929 1930Greece 10 drachmas - grain - 1930 1930Greece 20 drachmas - Neptune - 1930