Ejemplares de este tipo

Colección privada
s/f (1970) – (en) Series A; engraved (with grey border at top of reverse and purple border at bottom)Firmas: CMA, FIB(en) Series A; engraved (with grey border at top of reverse and purple border at bottom)
145 × 70 mm

s/f (1970) – (en) Series A; engraved (with grey border at top of reverse and purple border at bottom)Firmas: AIC, JBM(en) Series A; engraved (with grey border at top of reverse and purple border at bottom)

s/f (1971) – (en) Series B; lithographed (with grey/green border all around reverse)Firmas: AIC, JBM(en) Series B; lithographed (with grey/green border all around reverse)