WWI french military field glasses binoculars

i believe these areWWI  french possably british military field glasses (binoculars) they hve brown leather  and what could be brass there are some words around the eye pieces that say lemair fab with  t and a line under it then the word Paris and what looks to be a jet plane they look to be in pretty good shape but the case is not so lucky its top is missing and the case looks beat up

Fair