Watch List notes:

Banque du congo Belge, colour trial specimen 5 francs, ND (1914-24), no serial numbers, black on green underprint, woman and child at left, reverse, red, elephant and hippo,(Pick 4b6t, TBB B202), 'SPECIMEN NO VALUE' overprint in red, Waterlow & Sons cancelled stamp at lower right, '358' at top margin, previously mounted, in PMG holder 63 Choice Uncirculated, rare.

Estimate: £900 - £1,100