2027 Scott Standard Catalog Volume 5:
Countries N, O, P, Q, R, and S “Sam-“

Namibia – Nauru – Nepal – Netherlands – Nevis – New Caledonia – New Zealand – Nicaragua – Niger – Nigeria – Niue – Norfolk Island – Norway – Oman – Pakistan – Palau – Palestinian Authority – Panama – Papua New Guinea – Paraguay – Penrhyn Island – Peru – Philippines – Pitcairn Islands – Poland – Portugal – Portugal (Azores) – Portugal (Maderia) – Aatar – Romania – Russia – Rwanda – St. Helena – St. Kitts – St. Lucia – St. Martin – St. Pierre & Miquelon – St. Thomas & Prince – St. Vincent – St. Vincent Grenadines – El Salvador – Samoa.