Small sgraffito Jug unknown mark - Annegret Ehlers

Small jug that I bought years ago. I liked the style of its decoration. I would appreciate any information on the maker please, many thanks

By Annegret Ehlers, although the mark is sometimes attributed to her father, Alfred but the pieces look like '50s which was after his time.

Thank you so much for your informative response. I have spent many hours trying to decipher the mark without success before contacting you, many many thanks

Always tricky when it’s under the glaze