A first day cover of a Christmas airmail envelope commemorating Charles Wesley's hymn 'Hark! The Herald Angels sing'. Charles' hymn was first published in 1739 and the original opening couplet was "Hark! how all the welkin rings / Glory to the King of Kings".
The cover was issued by the Methodist Philatelic Society, which disbanded in 2020. Its function was to encourage the study of philately associated with Methodism.