I've always wanted an Olivetti Valentine and recently purchased one. To my surprise, there is a metal commemorative marker on the back that reads, in English, "Commemorative Edition. 31st Anniversary. 1965-1996. Special Anniversary Edition. 179/250". This was surprising because 1) the Valentine was released in 1969 and 2) production ended in 1975. From the reading I've done online, it seems like production lingered in Mexico, but 1996 seems very late.