stampstamp, they don't appear to be postage stamps since among other things they have no country of origin, no denomination, or any other text. These items fall under the very broad category of "cinderellas" which includes poster stamps, advertising, philatelic expo stamps, etc. Don't be downhearted as many of these are very collectible. In fact there is a separate topic area within SCF just for "cindys". A really great part of the Forum! Based on the hairstyles and fashions, your "cindys" look like they were produced in the late 1910s or early 1920s. By the way, welcome to SCF - it is without a doubt the finest philatelic on the Internet.
The image of the Bulldog at the bottom right was originally used on a cigarette card issued by Cavanders in the United Kingdom in 1926, (photograph probably taken by the Thomas Fall studio).....so would date these cinderellas around the late 1920's early 30's as the white dog, (Spitz) above the Bulldog was 1st used to my knowledge in a German set in the late 1920's. Best wishes, Brian.....Machins.
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