Claim: 2308 Schilt was discovered by C.U. Cesco at El Leoncito on May 6, 1967.
Evidence: C. U. Cesco
A. R. Klemola El Leoncito
(Yale–Columbia Southern Station) 6 May 1967 2308 Schilt 
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.