From 1968–1969, Rede Tupi produced new episodes of the soap opera "Beto Rockfeller" by recording over previous episodes; as a result, few episodes survive. After the closure of TV Tupi in 1980 the 536 tapes at its São Paulo studios were transported to a warehouse in the São Paulo suburb of Cotia and were simply left to deteriorate there until they were recovered by the Cinemateca Brasileira in 1985 and subsequently restored by TV Cultura in 1989. Only two Rede Tupi O&Os are known to have any preserved videotapes; TV Itacolomi's archives are now owned by the unrelated TV Alterosa, affiliated with SBT, whereas the few remaining tapes belonging to TV Piratini are stored privately in a museum in Porto Alegre, albeit in a heavily deteriorated state. Also, all the tapes at the Rede Tupi studios in Urca, Rio de Janeiro were later found to have been massively degraded by vinegar syndrome, hence they were unable to be restored.