Friedrich Albert Daniel Mehmel, born on December 6, 1827, in Allstedt, Sachsen-Weimar-Eisenach, and died on July 4, 1888, in Stralsund, Province of Pomerania, was a distinguished German organ builder based in Stralsund. He is celebrated as the most prominent organ builder in Pomerania of his time, alongside Barnim Grüneberg from Stettin. Starting his career under notable influences like Ibach and Friedrich Ladegast, Mehmel absorbed significant artistic and technical skills, which were later enhanced by the innovations of Aristide Cavaillé-Coll during Mehmel’s time in France. In 1858, after the passing of Matthias Fernau, Mehmel took over Fernau's workshop and continued his craft in Stralsund, eventually obtaining citizenship and marrying Marie Johanne Elise Caroline Raabe in 1859.

Mehmel’s career expanded rapidly, leading to the establishment of a significant organ building operation in Stralsund and later a branch in Wismar. His organs were known for their mechanical precision and featured both slider and cone chests. Mehmel developed his patented "Präcisionslade" windchest, enhancing the quality and reliability of his instruments. His work spanned across northern Germany, and he received the title of Court Organ Builder of the Grand Duchy of Mecklenburg-Strelitz after building the organ for Ratzeburg Cathedral. His legacy includes 74 known organs built across regions like Pomerania, Mecklenburg, Schleswig-Holstein, and occasionally abroad. Despite the destruction and remodeling of many of his instruments over the years, approximately 70% of his creations have been preserved, reflecting his significant contribution to the organ building heritage in Germany.

https://de.wikipedia.org/wiki/Friedrich_Mehmel_(Orgelbauer)