This stamp set features four types of modern public transport: Taxi, Bus, Mass Rapid Transit (MRT) system, and the Light Rapid Transit (LRT) system. All stamps have the Singapore Lion Symbol in their upper right corner.
12.08.1999. Butterflies. Joint issue with Sweden. Scott #903-906.
From left to right: Inachis Io (Peacock), Junonia Orithya (Blue Pansi), Hypolimnas Bolina (Great Egg-Fly), Vanessa Atalanta (Red Admiral).
Note differences sheet stamps above this lines and souvenir sheet below. The first stamp above has not facial value and it is valid for local standard postage, printed «Local Addresses Only». But in souvenir sheet the same stamp has a facial value of 22 cents.