WW 2 photos & paper & late 30's or early 40's B&W pictures on post card.

[papisa]

Hope i am in the right forum, will start with the easy one first. The post cards are the kind you would put in the mail, the are 3 1/2 inches high and 5 1/2 wide, the paper is very heavy and thick, the name on the back reads L.L Cook Co. Milwaukee Wi. i would assume Wi. because all of the photos at the bottom of all of the photos is printed Lake Lawn Lodge, Delavan Lake Wisc.
The photos are in excellant condition, no noticable yellowing in the snow photos or just the white.

The one photo has a big 4 door car in it with the old style wood licence plates, would any one of you no when they either started to make these or maybe the year that they stopped making them.

These pictures are Very Real from 1944, the size of them are 3 1/2W X 3 3/8H. The paper they are printed on all it says is Leonar on the back and they have like a design edge around them.
Would any body no the name of the Camera that they used in WW 2.

The pictures are of some U.S. Army troops walking in and around a Concentration Camp they must of found, well don't have to tell you what are in the photos.

I have all ready contacted the D-D Museum, i thought this might be the best place to start or can any one suggest another site.

Thank You for all of your Help in this matter.

Mike.