The mint mark is to the left of the axe (the LB to the right of the axe is the signature of the engraver, Lucien Bazor).
Here is a picture of a 2 francs with the B mint mark: https://www.cgb.fr/2-francs-francis...46926,a.html
Here is a picture of a 2 francs with the B mint mark: https://www.cgb.fr/2-francs-francis...46926,a.html






















