Picture #4 is an early 50s Channel Master 2 stack "Champion", which was available in single bay, double and quadruple stacked versions. Each bay consisted of 2 high band folded dipoles and a low band dipole, backed by 5 reflector elements. If you happen to have a Jan '54 Radio Electronics (15GP22 screen shot on cover) it is pictured on page 22 CM ad.
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