PM above a flying bird

[Pronxi]

Hi
Please help me identify this mark, (PM above an eagle or flying bird)
It is possibly from Marsseille

Thanks

Peter

http://www.picturetrail.com/sfx/album/view/23265985

[Margaux]

Pierre Motte
Initiales P.M.
Symboles: deux ailes déployées
28 mars 1919
Paris 48 rue Charlot

deux ailes déployées = two wings linked together