New old stock 1984 Motobecane Moto-Max MX 400

I work at at bike shop that been trading for over 90 years, as we are clearing out some of the old parts of the building, I've come across this.
Only things it's missing is it's original seat, seatclap, seat post, front brake.
I'll get some more photos and updates in the next few days as I clean it up.