It is CGHS. Upper Silesia plebiscite stamp. CGHS is a French abbreviation for: Commission de Gouverment Haute Silésie (Government Commission for Upper Silesia).
Thank you Jan-simon, your help is greatly appreciated. Vernon
Need help in ID of this overprint of an Official German stamp. I have not been able to find info on this in Scott catalog. The overprint: O.G.H.S. Vernon
re: German Official stamp and overprint
