The second mark on page
http://www.925-1000.com/Fgerman_marks_a1884.html
that is marked with "looking for info", (A and S on top of each other),
is documented in Mrs. Krekel-Aalberses "Jugendstil and Art Deco Silber" from 1989 as A.Ströbl (A.Stroebl).
Sadly I couldnt find any further information in that book, just the hallmark.