POLAND (1956) Bees. Dzierzon. Unaddressed FDC with cachet honoring Jan Dzierzon, who discovered parthenogenesis in bees. Scott Nos 744-5.
AVAILABLE AT $10
POLAND (1957) Flowers*. Set of 2 FDCs with flower cancel and cachet. Scott Nos 781-5. Yvert Nos 904-8.
AVAILABLE AT $15