Bank Melli Iran, uniface obverse and reverse plate colour die proof for 500 rials, ND (1944), blue, Shah Pahlavi at right, signatures Bamdad and Ebtehaj, reverse, Ruins in Persepolis,(Pick 45pp, TBB B140), obverse with 'Plate colour 30 blue.' in typed text, reverse with 'Blue 30.' in typed text, both in PMG holder 55 About Uncirculated and 58 Choice About Unc, very rare (1 pair).
Estimate: £800 - £1,000