Captain BelArgUSA . . .
. . .The classic 747-200/300s will not be retiring anytime soon; in fact one of the latest editions [s/n 24837/810] a -329SF was delivered to SN (Sabena) in October 1990, long after one of the first -412s [s/n 24063/736] was delivered to SQ (Singapore Airlines) in July 1989!