German Antique Beer Stein/Mug: Ruderclub Paula - Heinz Mueller - zum 3. Mai 1881

I found this antique beer stein today and although I don't collect steins, this one found its way home with me.
This link tells about the history of the Rowing Club Paula: https://www.rc-wiking.de/wp-content/uploads/2017/08/Historie.pdf
The club was founded in 1875. I have not yet found out more than what is mentioned in the above link but there seems to be a strong connection with the city of Lueneburg (close to Hamburg) in the north of Germany.

Thanks for looking:)