I search informations about shotshells ammunition made by firms from Poznań (Posen):
In 1850 Adolf Hoffmann opened firm in Poznań (Posen), in c. 1890 his firm was taken by Otto Beissel and works under name “Hoffmann A., nachf. O. Beissel - Gewehrfabrik in Posen” to year 1903. Then to firms accedes Stanisław Winiecki with change name to “Beissel i Winiecki dawniej A.Hoffman” to period IWW. After IWW Stanisław Winiecki have still firm under one’s own name.
I have information about ammo made by “Beissel&Winiecki” with name "ELITE"