Question juridique clé
Whether the appellant’s university years from 1951 to 1959 must be counted as AVS contribution years.
Solution extraite
The study years could not be added because strict proof of payment of student contributions was not established.
Motifs extraits
The account record contained no entries, and the available university and residence documents did not prove payment of AVS student contributions with the strict certainty required by Art. 141 para. 3 RAVS.