Yang EC279 1945 Su Chung surcharged with 'Internal Use' no value indicated for 'Unit Mail', mimeograph surcharged with reverse character, black char. Domestic Surface (內用機郵) on orange red Pigeon, issued without gum

Yang EC279 1945 Su Chung surcharged with 'Internal Use' no value indicated for 'Unit Mail', mimeograph surcharged with reverse character, black char. Domestic Surface (內用機郵) on orange red Pigeon, issued without gum