▁however ▁be ▁made ▁use ▁of ▁when ▁working ▁on ▁direct ▁transmission , ▁because ▁reception ▁at ▁the ▁other ▁end ▁was ▁not ▁automatic ▁as ▁in ▁the ▁case ▁of ▁a ▁ci pher ▁tele pr inter , ▁but ▁had ▁to ▁be ▁done ▁aur ally ▁by ▁the ▁operator . ▁That ▁was ▁one ▁of ▁the ▁many ▁reasons ▁why ▁the ▁automatic ▁transmission ▁part ▁of ▁the ▁machine ▁was ▁omitted ▁in ▁later ▁models . ▁This ▁was ▁done ▁when ▁Ober st ▁K ahn , ▁the ▁director ▁of ▁the ▁Pr ue f ▁ 7 ▁department ▁of ▁the ▁W affen amt , ▁left , ▁he ▁having ▁especially ▁advoc ated ▁this ▁strange ▁principle . ▁The ▁second ▁model ▁actually ▁constructed ▁was ▁like ▁the ▁model ▁designated ▁with ▁c ) ▁in ▁the ▁[ See ▁ 2 . 1 . 1 ] ▁section ▁above . ▁It ▁only ▁printed ▁clear ▁text ▁and ▁ci pher ▁text ▁on ▁ 2 ▁separate ▁stri ps . ▁B ugg isch ▁saw ▁it ▁in ▁January ▁ 1 9 4 4 ▁when ▁I ▁was ▁visit ing ▁Wa ▁Pr ue f ▁ 7 ▁Section ▁II ▁at ▁Pl ank en . ▁ ▁The ▁change ▁from ▁ci pher - techn ical ▁a ) ▁to ▁b ) ▁and ▁also ▁c ) ▁was ▁made ▁at ▁the ▁end ▁of ▁ 1 9 4 2 . ▁It ▁was ▁made ▁at ▁the ▁inst ig ation ▁of ▁the ▁Kriegs marine ▁who ▁laid ▁down ▁the ▁principle ▁that ▁any ▁newly ▁introduced ▁ci pher ▁machine ▁for ▁higher ▁H Q s ▁should ▁permit ▁inter change able ▁working ▁with ▁the ▁En igma . ▁The ▁Army ▁( He er ▁and ▁We hr macht )