Updated list, 3 new additions.
Bahamas
Bahrain
Bangladesh
Belgian Congo
Belgian Congo & Ruanda-Urundi
Botswana
British East Caribbean
Cape Verde
Cayman Islands
Chad
China
Cook Islands
Croatia
East Timor (Timor Leste)
Falkland Islands
Ghana
Guernsey
India
Japan
Jersey
Jordan
Kenya
Kiribati
Latvia
Malaya & British Borneo
Malaysia
New Zealand
North Macedonia
PNG
Rhodesia
Rhodesia & Nyasaland
Singapore
South Korea
South Sudan
Spain
Uganda
United Arab Emirates
Vanuatu
Viet Nam
Yugoslavia (Kingdom of Serbs, Croats & Slovenes)
Zimbabwe