Block numbers F69 and F70 on these Cuban 20 peso notes are counterfeits. They are sometimes found without serial numbers. The notes were issued to participants in the Bay of Pigs invasion of Cuba. Ironically, the scene on the back is the disembarking of the Granma, one of the first acts of the Cuban Revolutionaries that overthrew the Batista Regime. The Bay of Pigs invasion was designed to topple the Castro government.