British Banknote Royal Bank David Dale on Specimen One pound note of 1967.

        David Dale on Specimen Five Pound note of 1966. Two signatures both punch holed.

       British Banknote David Dale on Five Pound Specimen 1966. No prefix or specimen overprint.

        British Banknote Colour Trial in red of Ten pound note.  Colour actually used on the £100.

        British Banknote Royal Bank A/1 First prefix Ten pound note dated 1969