It doesn't exist anymore. The owner names were:
Jakowczyk Franciszek
Węgorowski Leon
Adress of photoshop was:
ulica Różana 4, Toruń. (Różana Street 4, Toruń)
This photoshop still exists in Torun?
This photoshop still existed after war. I found information dating back to 1948. I don't know what happened with the shop later, but it probably was shut down by communists.
You can find some photos taken in that photoshop on auctions; they are considered as collectors items.