I've noticed today from a 1974 timetable on the "Airline Route Updates" website that in 1974 Air New Zealand used to operate two weekly DC-8 services between Auckland and Pago Pago as well as a AKL-NAN-PPG-RAR-PPT weekly flight, also by DC-8. In other words, there were more TE flights to Pago Pago each work from Auckland than there were to Brisbane.
In addition, Pan Am also operated 707s to Auckland via Pago Pago at that time.
When I visited American Samoa for the first time in 1981 the Pan Am flights had ended and the former Inter-Continental hotel was in a sorry state, and when I returned in 2001 the Rainmaker was by then semi-closed.
My question is simple: was there really a Pago Pago-Auckland market, or did these flights occur simply because Apia didn't yet have an international airport - i.e. was there only the now-defunct Fagalii Airport and no Faleolo?