This image was acquired from
flickr. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
circle round Literary circle in the city of Reval. This stamp most likely denoted ownership by private library or literary society group. Given that the name on the stamp is Revel rather than the current name of Tallinn and uses the preSoviet orthography this stamp was most likely produced before . While the citys name was briefly