Watch List notes:

San Jose, Costa Rica, Banco Central, 20 colones, 10-7-1972, low serial number 9, "BARBA" text error, finest known in PMG census, encapsulated PMG Choice UNC 64 EPQ. SCWPM-238a. Series C, serial C0000009. This note has four things going for it: a very low serial number, has the printed signature of 1987 Nobel Peace Prize recipient Oscar Arias, a text error with BARVA misspelled as BARBA, and is the finest known for the type (errors withstanding) in the PMG census. PMG #8042506-003.
($1500-2250)