BOLIVIA (1951) Track events*. Imperforate S/S of 3 stamps overprinted SPECIMEN, with control punches. Scott No C155a, Yvert No BF14.
AVAILABLE AT $100
BOLIVIA (1954) Map of Bolivia*. Grain*. Cow's head*. Set of 4 overprinted MUESTRA. Agrarian reform congress. Scott Nos 384-7, Yvert Nos 351-4.
AVAILABLE AT $50
BOLIVIA (1995) Pasteur*. Dogs*. Stamps*. Imperforate S/S marked "MUESTRA". Not listed in catalog, possibly issued at Philatelic Exhibition.
AVAILABLE AT $15