German Christmas Cinderella, From When?

Hello,
Does anyone know this German Christmas stamp, and whether it was issued in United Germany or West Germany? Thanks

Most likely Austria
Your Christmas seal is from the "Schwestern Maria" (Sisters of Mary)
From the 90's but I do not know the exact date.
Here are another stamp and a full pane with different designs.

I knew that if anyone could find it, it would be you. Thank you.

Is the seal the set of numbers on the stamp? I couldn't figure them out.

The set of numbers on the sticker look like a cancellation. This sticker was probably attached to a letter close to the actual postage stamps


Peter

German, Dernbacher Schwestern Maria Spendemarke.

The seals are sold to raise money for projects to help children in poor countries. The dot-matrix code looks like a typical code some countries use for sorted mail.

German,are you sure ?
From their website :

Die in Österreich als „Die Schwestern Maria" bekannte Kongregation wurde im Jahr 1964 durch den Prälaten Aloysius Schwartz als „Sisters of Mary of Banneux, Inc." in Asien gegründet und ist nach pontifikalem Recht anerkannt. Mehr als 370 Schwestern führen aktuell 18 Wohn- und Bildungsstätte, unter anderen auf den Philippinen, in Mexiko, Guatemala, Brasilien, Honduras und in Tansania, sowie einige Tageskliniken.

Translation :
The congregation, known in Austria as the "Sisters of Mary", was founded in Asia in 1964 by the prelate Aloysius Schwartz as the "Sisters of Mary of Banneux, Inc." and is recognized under pontifical law. More than 370 nuns currently run 18 residential and educational institutions, including in the Philippines, Mexico, Guatemala, Brazil, Honduras and Tanzania, as well as some day clinics.

Philaseiten has a post that shows another seal that is similar. It ascribes these to the same organisation in Dernbach (DE). Also, Last Dodo lists a couple in the Germany section (not to sure if that is based on facts).

These seals, probably, were not issued by the organisation, but by a specific congregation.

https://www.philaseiten.de/cgi-bin/...x.pl?ST=2053

It has a Mannheim cancellation.

Thank you all, very much.
I see in the cancellation "18SHK212". From this, it is possible to identify the country? Or is it the size or setting of the dots?