This is  Australian banknote - $1 1968 Coombs/Randal , scarcest $1 signature Prefix AHE 622863 Banknote slabbed and graded by PCGS as 58 or Choice aUNC, Plastic cover in excellent condition,see  scans .  Renniks catalogue  valuation of such banknote are $900!!!  but I start from very,very LOW  price for this quality note Reasonable offers will be considered  GET a BIG,BIG  bargain !!! Happy bidding