We are now used to the fact that in most flights, specially when we fly short-haul, on board "service" is BOB ... but we also know that it was not always like that. It was quite common, however, to charge alcoholic drinks in Economy class. This is a Vintage 1959 Iberia brochure, showing a fare list for international flights.
If you care, take a look at the current menu ... IMHO, one of the worst in Europe and outrageously expensive.
El menú a bordo "Tu menú" de Iberia en 2010 (Iberia BOB "Tu menú" in 2010)