HABANA. 100 Acciones de 1 Peso. green, black, red seal. No 8358. Folds and a little foxing. Vignette of a tropical oilfield. U.S companies (of which this is one) were the first to develop Cuba's oil, but it has never been very important. The main oilfield is east of Havana, near the Varadero peninsula, and produces a heavy oil, difficult to refine.