This question seems be absurd, as everyone know that the first album by Jerry Lee was Sun LP-1230, released on May 1958.
Nevertheless, the discography by Wim de Boer, Henk Van Raay and others in the Jerry Lee Lewis International Fan Club (Holland) sets as No.1 (just before LP-1230) the South Africa's 10" LP London ZAT-S.5520 "Jerry Lee Lewis And His Pumping Piano", released also in 1958.
Maybe someone know the month of release of this LP?