Similarly, the other notes issued by this banks range from scarce to rare. The banknotes from the First National Bank of Porto Rico are particularly scarce, this is because the institution's issues didn't even reach quantities of 20. Only two bills from the $100 denomination have been known to survive, similarly two from the $20 issue are left, with one of them being acquired by Amon G. Carter before his death. Carter was known to exhibit the piece, but didn't make it available for sale. More than a dozen $10 banknotes survived, seldom appearing at auctions. Other extremely rare banknotes include the 2 and 4 "real" notes of 1813 and all of the denominations issued by the "Caja de Ahorros de Ponce". In contrast, the paper money used by the Puerto Rico Railroad Company is still known to appear occasionally in the market. Outside of these, the clandestine bills issued by the Central Republican Board of Cuba and Puerto Rico, range from scarce (5-"peso" bill) to extremely rare (20-"peso" notes).