OLD - Happy Macro Mondays
This thermometer surely still does judge when that jelly is done! My mother used it to make excellent candies during the '60s.
The Tel-Tru website quotes, "The Germanow-Simon Corporation was founded in 1916 in Rochester, NY. Starting as a small machine shop, the company quickly grew to become a major supplier of replacement watch crystals made of plastic. During the 1930s G-S purchased Tel-Tru Manufacturing Company and developed this division to become a leading supplier of bimetal thermometers."