4c blue on yellow pelure paper 'Correo Rapido de Norte Santander' EXPRESS issue a superb unused bottom marginal block of four. Very scarce in multiples. (Hurt & Williams #S1)
4c blue on yellow pelure paper 'Correo Rapido de Norte Santander' EXPRESS issue a superb unused bottom marginal block of four. Very scarce in multiples. (Hurt & Williams #S1)