Watchmen's Time Detectors Operated by Batteries or Magneto Generators (1900)
Holtzer-Cabot Electric Company · Holtzer-Cabot Electric Company · leaf 30
. 60 Ohms. When the regular magneto cannot be heard, extension bellsare usetul as an auxiliary call, and may be placed in anyconvenient location. PRICE Cat. No. 47:1 Made in Oak, Walnut and Cherry woods $3.00 STANDARD EXTENSION BELLS. 80 to 500 Ohms. The regular 80-Ohm Extension Bell is all that is… … Standard Extension Bell.Cat. No. 472.
