1924 WEMBLEY EXHIBITION FIRST DAY ENVELOPE:23 April 1924 env. from Wembley to Alfreton bearing at lower left 1924 Wembley 1d & 1½d tied by "LONDON N W/28" cds with a v fine "Hey Dolphin" Empire Exhibition 1st day machine cancellation struck where the adhesives would normally be placed. Fine (Image)

1925 WEMBLEY FIRST DAY ENVELOPE:9 May 1925 env to Hyde Park bearing 1d & 1½d tied by a fine Exhibition "Hey Dolphin" machine cancellation of the day of issue. Scarce. BPA Cert (1972). (Image)

1924 WEMBLEY EXHIBITION FIRST DAY COVER ETC:23 April 1924 env (top flap missing) from Wembley to Covent Garden bearing 1924 Wembley 1d & 1½d tied by Hey Dolphin Empire Exhibition machine cancellation. Also a piece bearing Wembley 1½d strip of three with the same cancellation.. Plus 1d (2) & 1½d with large Empire Exhibition Wembley Park 1st day cds (Image)

1924 WEMBLEY EXHIBITION FLOWN FIRST DAY COVER:23 April 1924 env from Wembley to Paris franked with 1924 Wembley 1d & 1½d plus 1912-22 2d all tied by a fine Hey Dolphin Empire Exhibition machine cancellation, red "AIR POST" struck nearby. One line of address panel erased . Scarce. (Image)