José Paulino Núñez, a thirty-three-year-old YPF employee at Luján de Cuyo, reportedly encountered two suited figures while descending a fuel-oil tank on June 30, 1968. Los Andes’s September 2 report, later republished from its archive, conveyed the story through his colleague Enrique Serdoch. Núñez initially thought the figures were guards. The newspaper gives approximately 1:15 a.m.; Hatch gives 1:20 and Anganuzzi’s later book 12:30.
The figures showed him a circular display about thirty centimetres across, containing moving images of ordinary people walking. They allegedly spoke in metallic-sounding voices and suggested others would see similar things. Their one-piece outfits resembled diving suits. The newspaper explicitly says Núñez had not noticed unusual stature, while later versions make them short and add progressive paralysis. His elevated position on the stairs limited comparisons of height.
Núñez reportedly could not recall reaching his truck or driving the kilometre back to the laboratory, where Alberto González found him pale and distressed. A return visit produced nothing unusual. He authorized publication after the separate Peccinetti–Villegas casino story attracted attention. Los Andes’s later statement that the casino case was a hoax concerns those other witnesses, not a demonstrated confession by Núñez. No identifiable vehicle or medical procedure is established in this account.
The programme places the meeting on a beach and describes the display as a luminous sphere showing pale blond people. The earlier Los Andes account places Núñez on fuel-tank stairs and describes a circular display with ordinary moving people. This is a variant retelling of the named June30 encounter, not support for those changed details.