| Country | Action | Action Date | Effective Date |
|---|
| ALBANIA | Signature | 12/07/1927 | |
| ALBANIA | Ratification | 31/08/1929 | |
| BELGIUM | Signature | 12/07/1927 | |
| BELGIUM | Ratification | 09/05/1929 | |
| BRAZIL | Signature | 12/07/1927 | |
| BULGARIA | Signature | 12/07/1927 | |
| BULGARIA | Ratification | 22/05/1931 | |
| BURMA | Withdrawal | 01/10/1951 | 01/10/1952 |
| CHINA | Accession | 24/05/1935 | |
| COLOMBIA | Signature | 12/07/1927 | |
| CUBA | Signature | 12/07/1927 | |
| CUBA | Ratification | 18/06/1934 | |
| CUBA | Withdrawal | 08/10/1956 | |
| CZECHOSLOVAKIA | Signature | 12/07/1927 | |
| CZECHOSLOVAKIA | Ratification | 20/08/1931 | |
| CZECHOSLOVAKIA | Withdrawal | 30/06/1951 | |
| DANZIG | Signature | 12/07/1927 | |
| DANZIG | Ratification | 11/07/1930 | |
| ECUADOR | Signature | 12/07/1927 | |
| ECUADOR | Ratification | 30/07/1928 | |
| EGYPT | Signature | 12/07/1927 | |
| EGYPT | Ratification | 07/08/1928 | |
| EGYPT | Declaration | 07/08/1928 | |
| EGYPT | Withdrawal | 01/08/1955 | |
| FINLAND | Signature | 12/07/1927 | |
| FINLAND | Ratification | 10/04/1929 | |
| FRANCE | Signature | 12/07/1927 | |
| FRANCE | Ratification | 27/04/1932 | |
| FRANCE | Withdrawal | 20/02/1973 | 20/02/1974 |
| GERMANY | Signature | 12/07/1927 | |
| GERMANY | Ratification | 22/07/1929 | |
| GREECE | Signature | 12/07/1927 | |
| GREECE | Ratification | 16/01/1931 | |
| GREECE | Withdrawal | 06/11/1963 | |
| GUATEMALA | Signature | 12/07/1927 | |
| HUNGARY | Signature | 12/07/1927 | |
| HUNGARY | Ratification | 17/04/1929 | |
| HUNGARY | Declaration | 17/04/1929 | |
| HUNGARY | Withdrawal | 13/11/1951 | |
| INDIA | Signature | 12/07/1927 | |
| INDIA | Ratification | 02/04/1929 | |
| INDIA | Withdrawal | 09/11/1950 | 09/11/1951 |
| IRAQ | Accession | 12/06/1934 | |
| IRAQ | Withdrawal | 10/04/1961 | |
| ITALY | Signature | 12/07/1927 | |
| ITALY | Ratification | 02/08/1928 | |
| LATVIA | Signature | 12/07/1927 | |
| LUXEMBOURG | Accession | 27/06/1929 | |
| LUXEMBOURG | Withdrawal | 20/04/1964 | |
| MONACO | Signature | 12/07/1927 | |
| MONACO | Ratification | 21/05/1929 | |
| NEW ZEALAND | Withdrawal | 02/08/1951 | 02/08/1951 |
| NICARAGUA | Signature | 12/07/1927 | |
| PERSIA | Accession | 28/09/1932 | |
| PERU | Signature | 12/07/1927 | |
| POLAND | Signature | 12/07/1927 | |
| POLAND | Ratification | 11/07/1930 | |
| PORTUGAL | Signature | 12/07/1927 | |
| ROUMANIA | Signature | 12/07/1927 | |
| ROUMANIA | Ratification | 11/09/1928 | |
| ROUMANIA | Withdrawal | 24/12/1963 | |
| SAN MARINO | Signature | 12/07/1927 | |
| SAN MARINO | Ratification | 12/08/1929 | |
| SPAIN | Signature | 12/07/1927 | |
| SUDAN | Accession | 11/05/1928 | |
| SWITZERLAND | Accession | 02/01/1930 | |
| TURKEY | Signature | 12/07/1927 | |
| TURKEY | Ratification | 10/03/1932 | |
| UNITED KINGDOM | Ratification | 09/01/1929 | |
| UNITED KINGDOM | Accession | 09/01/1929 | |
| UNITED KINGDOM | Withdrawal | 04/05/1948 | |
| URUGUAY | Signature | 12/07/1927 | |
| VENEZUELA | Signature | 12/07/1927 | |
| VENEZUELA | Ratification | 19/06/1929 | |
| YUGOSLAVIA | Accession | 28/08/1931 | |
| YUGOSLAVIA | Withdrawal | 05/07/1951 | |