Help identifying this "china cabinet", it's a Mid Century Modern wall hung floating cabinet/bar/credenza Danish?  

Teak veneer cases. I think the wall mounts might not be teak, can't tell from the photos. 
The black mark on the Masonite back might be a mark for the manufacturer of the Masonite. Something about the direction and placement make me think that.

leif, i don not think the masonite markings are the markers marks.  but i could be 100% wrong as well tho
i have a pair of his and hers danish teak twin beds tha go together to make a king and they both have a sheet of masonite over the slats which has a smiliar marking which even though its not the same, i think it is the makers of the masonite 
i would guess than its suppose to say something "Board"  like in my case it says SWAN Board  and also made in sweden 

I was trying to say that I think the mark is not for the maker of the furniture but for the maker of the Masonite. 

Fascinating hanging system. I wonder if the uprights/hooks are spaced for 16"OC wall studs. Also curious is that the presumed mounting screws appear to be machine screws - possibly parts of toggle-type hollow wall fasteners - and probably not original.

My bad Leif. I see that now.

HI all, thanks for all your comments! I finnally found a label inside one of the base cabinets, it's a PS System Danish Furniture Design No. 3309. As tktoo mentions I don't think the screws are original.
Here are a few more pictures.
The size of the 3 base cabinets is 31 1/2" wide by 18" deep by 19 1/2" high, all of them have wooden swing doors and one opens on the top.
The glass door cabinets are:
one is 31 1/2 wide by 13 1/2 deep by 13 3/4 high
and the other is 31 1/2 wide by 8" deep by 20" high
and the small wooden door cabinet is: 31 1/2" wide by 12 1/4" deep by 11" high.
Very nice looking set!