The index page for the 1954 French flap section of this site is here.
Reference number for this case: 4-Nov-54-Vallet. Thank you for including this reference number in any correspondence with me regarding this case.
[Ref. 732] JEAN SIDER:
French ufologist Jean Sider found about the case in the newspaper La Résistance de l'Ouest of November 5, 1954, and he indicates that on November 4, 1954, at 7:15 in Vallet, a phenomenon of sharp red ball leaving behind itself a trail of several meters was seen from several places of the community of Vallet by several people who located it as being above the village of Courrères-Iseron and as going from the west to the east.
Not looked for yet.
(These keywords are only to help queries and are not implying anything.)
Vallet, Loire-Atlantique, multiple, Courrères-Iseron, ball, red, trail, sky
[-] indicates sources which I have not yet checked.