Diagonal black MUESTRA ovpt front; all-zero s/n 50 pesos Values
Details
Obverse: Spanish text; Banco Nacional de Cuba seal with star, shield, and laurels in circle; zig-zag underprint pattern radiating from center; large B in circle
Reverse: Spanish text; Castillo de la Chorrera (Castle of La Chorrera river), stone fortress in Havana circa 1646