Occasionally the Royal Bank of Scotland issues commemorative banknotes. Examples include the £1 note issued to mark the 150th Anniversary of the birth of Alexander Graham Bell in 1997, the £20 note for the 100th birthday of Queen Elizabeth The Queen Mother in 2000, the £5 note honouring veteran golfer Jack Nicklaus in his last competitive Open Championship at St Andrews in 2005, and the £10 note issued in commemoration of HM Queen Elizabeth II's Diamond Jubilee in 2012. These notes are much sought-after by collectors and they rarely remain long in circulation.