No, 'POSTVEREIN' refers to the Deutsch-Österreichischen
Postverein (Austro-German Postal Union) of which Baden became a member on 1 May 1851 (being one of the first postal authorities to join.
https://en.wikipedia.org/wiki/Austr...Postal_UnionIt says 'Postage Stamp,' 'Baden,'
and 'Austro-German Postal Union.'
Edit, as you can see, it is a crude reproduction of the original 1860 6 Kreuzer stamp that has the same insriptions.
