This 1996 Queen Elizabeth II 70th Birthday crown coin cover is a UK first day cover by Mercury. It celebrates the 70th birthday of HM Queen Elizabeth II and hosts a crown coin by Royal Mint and Royal Mail stamps. The brilliant uncirculated coin features Her Majesty on horseback, the tradition of Trooping the Colour ceremony on her birthdays. Cancelled postmark 70th Official Birthday of Her Majesty Queen Elizabeth II Windsor 15th June 1996.