From ASN:

AIRCRAFT HISTORY

G-BKYI – Boeing (13 DEC 1984) first flight
G-BKYI – British Airways (07 JAN 1985) delivered
ZS-OLB – Comair (06 JUN 1999) delivered
ZS-OLB – Comair (JAN 2011) withdrawn from use and stored at Johannesburg (JNB)
AP-BKC – Bhoja Airlines (FEB 2012) bought