This article was published in the daily newspaper Le Méridional, France, page 10, on January 15, 1955.
TARRAGONE. -- "A strange object, of circular form", was seen, during more than one hour, at a very high altitude, above the village of Porrera, in the province of Tarragone.
The priest of the village, who observed it with a binocular, claims that it "shone like the sun" and that it was crowned on its top partof a kind of sphere having the shape of a mushroom."
The apparatus "which evolved very slowly" disappeared following a North-South trajectory.
Note: an excellent description of a science balloon.