I Need Some Help: "Hitler Jugend Werkarbeit Kriegs - Whw"

I need some help with the identification of these stamps. There probably not normal postage stamps because there is no denomination on them.

I found these stamps in the collection of my grandfather and I can't get a definitive identification. I suspect they were issued to collect funds for the "kriegs - whw.

I would appreciate any information about these stamps.

The picture can be found by using the link below.

https://www.mupload.nl/img/tlsoz6faden.jpg

A Cinderella from the 3rd Reich - Something about Hitler Youth factory work for the war effort

I can only assume that these 'stamps' were part of the program that obligated Hitler Youth members to work for the nation during the war. In many cases, young people were put to work making the small toys and badges, &c. that were given to those who donated to the Winterhilfswerk.

In the case of the Winterhilfswerk, this organization gave small notices that one had given to the organization and that could be placed in one's window. This was effective, perhaps, in discouraging more solicitations for donations. I think these were given out monthly.

Perhaps the 'stamps' you have would be carried on a young person's person to prove that he or she had fulfilled his or her duty?