Romania holey coins

Rulers
Carol I (as Prince)1866-1881
Carol I (as King)1881-1914
Ferdinand I1914-1927
Mihai I1927-1930
Carol II1930-1940
Mihai I1940-1947
KM# 311905,1906,1906J5 banicopper-nickel
KM# 321905,1906,1906J10 banicopper-nickel
KM# 331905,1906,1906J20 banicopper-nickel
KM# 441921HF25 banialuminumSizes of center hole vary from 3.8-4.5mm
KM# 451921HF50 banialuminum

2004 standard catalog of WORLD COINS by Chester L. Krause and Clifford Mishler
1