Serious Goods the earliest first issue date & signature combination for this very rare banknote. For the advanced signature variety & date collector that is missing this type & date 10 December 1931!! THE ONLY 1931 DATED MONA LISA NOTE OFFERED FOR SALE! ONLY RECENTLY ACKNOWLEDGED BY THE SCWPM REFERENCE CATALOG AS FOR ITS EXISTENCE. Mona Lisa Note of two Colones.The item "Banknote COSTA RICA 2 Colones TWO 1931 Mona Lisa note P 167 RRR" is in sale since Saturday, May 31, 2014. This item is in the category "Coins & Paper Money\Paper Money\ World\North & Central America\Costa Rica". The seller is "dusan2" and is located in Houston, Texas. This item can be shipped worldwide.