Actually, you best bet might just be a single pole, not at all plumb, with the wire slack on the ground sweeping up to the insulator. Conveys the message without introducing dangling wire into the equation.
Given that you are intending North Africa in the 40s, you probably only need a poel with insulators mounted to the side, rather than on a cross bar. (Probably little electrification, so a phone line and a telegraph cable perhaps.)
Probably only needs to be about 10' tall to scale (right at 3.75" out of the ground) too.