Do you mean JNB? QF doesn't fly to Cape Town.

There are only 3 744s still in service with the old F seats, and they'll be reconfigured or withdrawn from service shortly. If one of those aircraft is planned for your flight, row 1 is 1A and 1K. Otherwise, row 1 has ABJK and is either Skybed 1 or Skybed 2 as detailed in Serfty's post.