New mint: Stumpf und Sohn, Danzig/Gdańsk [résolu]

Hello everyone,

I am looking to add a new mint to the Numista coin catalogue. It was called ‘Stumpf und Sohn’ and it's was a jeweller who used to make a lot of gold, silver and amber jewellery, but they also minted coins for the city of Danzig in 1920. The main shop was likely on the ‘Langgasse 29-30’, today's ‘Ulica Długa’. The location of the street itself is N54°20'51 (Lat. 54.34938) and E18°38'58" (Lon. 18.649446) (I am not sure about the exact address in the modern city)

Here are some of the coins they minted:

N#24737 (together with the Gewehrfabrik)

N#141786

N#141788

(and more)

Here's a Polish notgeld catalogue that mentions the manufacturer:

https://www.notgeld.com.pl/polskie/index.php?l=pl&co=gdansk&acc=pl

The German wikipedia page about the jeweller:

https://de.m.wikipedia.org/wiki/Moritz_Stumpf_%26_Sohn

And more:

http://forum.danzig.de/showthread.php?4748-Moritz-Stumpf-amp-Sohn

https://commons.m.wikimedia.org/wiki/Category:Moritz_Stumpf_%26_Sohn?uselang=de

Thanks, I just added the mint. Danzig would be your speciality it seems (not only from the name :) )