Watch List notes:

(x) Government of Brunei, progressive proofs (3) for a 50 ringgit, ND (1979), no serial numbers, green and multicoloured, all outline Sultan Hassanal Bolkiah at right, reverse green and white, also one fully printed with Sultan Hassanal Bolkiah at right(Pick 9 for type, TBB B109 for type), uncirculated, rare in this format (4).

Estimate: £700 - £900