Otto Hupp

Hermann Joseph Otto Hubert August Constantin Hupp (May 21, 1859 – January 31, 1949) was a German graphical artist.

His father made him learn engraving as his profession, and, shortly after finishing his education, he moved to Munich in 1878.

About 1895 he made a study of the volume and concluded that it had qualities in typography and production which suggested it was earlier than the Gutenberg Bible.

[5] Though he sold his copy, after several decades the argument took hold and by 1940 the Missal was recognized as predating Gutenberg's famous work.

[6] However, by the early 1960s further research by Allan H. Stevenson using watermark analysis demonstrated it was actually printed 20 years later than Gutenberg's work (in the fall of 1473).