~ Uebung stählt die Kraft ~
Here's a motto for the "4F" gymnasts associations on this stein made by August Sältzer of Eisenach ca. 1880. Gut Heil! (Good Health!) is also the main motto of the Turners (gymnasts) founded in 1815 by Friedrich Jahn.
Uebung stählt die Kraft. Exercise tempers the strength.
Translation: Roy De Selms
Photo credit: Unknown