Cologne, Rhine Province or Rhenish Prussia, Prussia (now North Rhine-Westphalia)
Destillation Feinster Liqueure und Punsch Syrupe. Grosshandlung Sudweinen ausländischen Spirituosen. /
Distillation of the finest liqueurs and punch syrup. Wholesaler of sweet wines and foreign liqueurs.
Known dates: prior to 1900
The German spelling for Cologne, varied over the years. So in 1900 the Prussian Minister for Interior Affairs, issued an edict that the correct spelling for Cologne was Cöln. However, on the 1st February 1919, the mayor of Cologne, Konrad Adenauer, stated the official name was again Köln. Probably most people continued to use the spelling they preferred.
Purchased steins from: S.P.Gerz I.
Reference:
Impressed marks on featured flask. Advertisement for Herm. Jos. Peters & Co 
S.P. Gerz I #1402, prior to 1900. 
Details of flask stopper. 