Swiss Bicycle Zeltbahn

Steve G Thinks this is a Special Zeltbahn issued to Swiss Bicycle troops , it is the only one I have ever seen , dated 1956 it is made of heavy canvas that I believe was treated for rain , metal buttons and is shaped very much like the BG shelterhaves or a U.S. pup tent with the exception of having built in sleeve's, I have had this piece for a couple 3 years now and thought it would make a nice edition here I do not know how rare these are , but I have not seen another nor have seen them referenced out side of this one on a couple of boards.