I don't know what these hangers are supposed to be. They are not Social Welfare as those hangers have a grey stripe and squared buckles. They are similar to Red Cross hangers but the stripe is not correct as the Red Cross hangers have thin red outline stripes not a solid one such as this.
In my humble opinion a very bad fake by somebody who did not know the real structure of original RC hangers. Perhaps used some original hardware parts but I am not sure about that from these pics, could also be a total fake. Here are real RC hangers, Regards,