Sturmey Archer DRUM brake.
yes ! +1, no squeal since 1985, (when I bought them) UK name was 'Elite',
the company has been sold to TW in the mean time..
My Magura HS 33 Hydraulic Rim Brakes have Never squealed Either ..
Mafac from the mid 70s, and Modolo cyclocross cantilevers .
I Fix squeals .. my self ..
Pay a Shop if you are not a mechanic.