My grandfather owned that exact Altec 711A receiver you have shown. It was used in the system he had at my grandparents' summer cottage along with a pair of Rectilinear Highboys and the AR turntable.
I see it listed as a "100 watt receiver" (which meant 50 wpc back in those days) but in reality I think 30 - 35 wpc WRMS is truer.
Thanks for the memories and good luck with the restoration of your Flamencos and be sure to post some pictures when finished.
