Watch List notes:

(x) Banco Central de Guatemala, a colour trial specimen 1 quetzal, ND (1934-45), specimen number 611, blue, yellow and pale purple, quetzal bird on column at left and right, value at right centre and at each corner, landscape at left, reverse blue, the monolith of Quirigua, (TBB BCG B9, Pick 14cts), perforated, red SPECIMEN WATERLOW & SONS LIMITED overprint at low left and right, in PMG holder, previously mounted, 63 Choice Uncirculated, only 2 graded on PMG population report, first one has 58 Choice About Unc, with this example being the highest grade by far, rare.

Estimate: £300 - £350