Claim: 2308 Schilt was discovered by A.R. Klemola at El Leoncito on May 6, 1967; however, its precovery was taken at Heidelberg Observatory in 1921.
Evidence: However, the first (unused) precovery was already taken at Heidelberg Observatory in 1921. It was discovered on 6 May 1967, by Argentine astronomer Carlos Cesco together with American astronomer Arnold Klemola at the Yale–Columbia Southern Station at Leoncito Astronomical Complex in Argentina. El Leoncito
(Yale–Columbia Southern Station)