POLAND (1951) Stanislaw Staszic*. Black print. Scott No 511, Yvert No 608. Leader of Polish Enlightenment.
AVAILABLE AT $15
EAST GERMANY (1971) Karl Liebknecht*. Rosa Luxemburg*. Imperforate phase proof pair in final colors. Founders of Spartacist Movement. Scott Nos 1276-7, Yvert Nos 1335-6.
AVAILABLE AT $80
AUSTRIA (2018) The Generation Question РCohabitation of Future Generations Р"Two Faces̫. Black print.
AVAILABLE AT $15
AUSTRIA (2022) Ludwig Wittgenstein*. Black print.
AVAILABLE AT $15