I looked for contemporaries for Georg Lindner & found the following in a 1846 Suhl listing, but no >>ER<< mechanics were listed:

Andreas Reinhardt

Nicolaus Rei

Johann Heinrich Rittelbach

Georg Christ. Rll

Stephan Gabriel Rosch

Christian Rosenthal

Gottlieb Hermann Rud(?)

As a sidenote, there was an August Rempt, listed as a Klempnermeister but I am not sure if he made tubes are not?

Serbus,

Raimey
rse