Watch List notes:

Banco Salvadoreno, El Salvador, colour trial 1 Colon, ND (1920), brown on green underprint, seated woman with sheaf and wheel at centre, reverse, green, Columbus at centre,, (Pick S211ct), in PMG holder 64 Choice UNC, perforated, red SPECIMEN WATERLOW & SONS LTD overprint, rare.

Estimate: £300 - £350