FRANCE. POLACK EXPERIMENTAL HELMET. Adrian model 1915 helmet with Polack-Landret visor in zinc-plated steel known as long, shell without insignia slots and with factory modifications for visor attachment, i.e. a corrugated slat placed under the front of the crest; factory dark horizon blue matt finish, 1st type inner cap in black leather stamped "59B3, original riveted chinstrap. ABE