The Qwikline ll mcb's will not fit the Original Qwikline board but you can still get the MCB's to suit this old board, all breakers will be referenced QO and only available in C Type now as B type is obsolete. part number for 16A type C single phase, would be QO116VSC10 (16A), or QO132VSC10(32A) QO140VSC10(40A) QO163VSC10(63A)
(please note Qwickline II breakers are now known as Resi9 which are only compatible with Qwickline II boards)