Brazil 1991 Butantan Institute & National Museum set of 4 (2 se-tenant pairs) unmounted mint SG 2481-84
Brazil 1991 Butantan Institute & National Museum set of 4 (2 se-tenant pairs) unmounted mint SG 2481-84
Brazil 1991 Butantan Institute & National Museum set of 4 (2 se-tenant pairs) unmounted mint SG 2481-84