Otto Hupp
Oberschleißheim - Munich, Bavaria.
Entwerfer & Künstler / Design & Artist
Known dates: Born Düsseldorf in 1859. Died Oberschleißheim - Munich in 1949. Active 1887 - 1925
In 1884, Otto Hupp designed the current Spatenbräu brewery logo, which was used by Reinhold Merkelbach, Simon Peter Gerz I and probably others, on lids of steins commissioned directly by the brewery.
Designed for: Villeroy & Boch - Mettlach, Reinhold Merkelbach
Reference: Stein Collectors Klingspor-Museum Wikipedia Stein Collectors 2 Capacity Marks
Spatenbräu brewery logo insert on topside on pewter lid. 
Lid, on featured S.P. Gerz I stein, probably by Ludwig Mory. 
Villeroy & Boch - Mettlach #3043, dated 1905, designed by Otto Hupp. 
Stein by S.P. Gerz I. Lid probably by Ludwig Mory. 
Otto Hupp's unique logo. 
Featured S.P. Gerz I stein showing capacity mark, and side view of probable Ludwig Mory lid, 