9 0 ▁aircraft ▁being ▁built ▁for ▁France ▁and ▁ 1 2 ▁P ote z ▁ 3 9 1 ▁variants , ▁power ed ▁by ▁a ▁Lor raine - D iet rich ▁ 1 2 H ▁engine ▁of ▁ 7 0 0   b hp , ▁for ▁the ▁Per uv ian ▁Air ▁Force . ▁A ▁number ▁of ▁prototype ▁and ▁development ▁aircraft , ▁including ▁a ▁float plane , ▁were ▁tested ▁but ▁no ▁further ▁orders ▁were ▁received . ▁ ▁Service ▁First ▁production ▁aircraft ▁were ▁delivered ▁in ▁ 1 9 3 4 ▁and ▁the ▁P ote z ▁ 3 9 ▁began ▁to ▁be ▁replaced ▁by ▁AN F ▁Les ▁M ure aux ▁ 1 1 7 , ▁Am iot ▁ 1 4 3 ▁and ▁P ote z ▁ 5 4 0 ▁aircraft ▁began ▁in ▁ 1 9 3 6 . ▁At ▁the ▁out break ▁of ▁World ▁War ▁II , ▁the ▁P ote z ▁ 3 9 ▁remained ▁in ▁service ▁with ▁seven ▁observation ▁squad rons ▁of ▁the ▁French ▁Air ▁Force , ▁but ▁these , ▁along ▁with ▁the ▁B reg uet ▁ 2 7 - equ ipped ▁units , ▁were ▁with dra wn ▁from ▁the ▁front ▁in ▁October ▁ 1 9 3 9 . ▁The ▁P ote z ▁ 3 9 ▁continued ▁to ▁serve ▁in ▁training ▁units ▁until ▁the ▁arm ist ice ▁of ▁June ▁ 1 9 4 0 , ▁at ▁which ▁time ▁ 4 1 ▁remained ▁in ▁Metropolitan ▁France . ▁These ▁aircraft ▁were ▁scra pped ▁soon ▁after ward . ▁ ▁Vari ants ▁ ▁P ote z ▁ 3 7 ▁Two