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resistance standard (0.1 Ohm)

resistance standard (0.1 Ohm)

Otto Wolff
circa 1900
resistance standard (0.01 Ohm)

resistance standard (0.01 Ohm)

Otto Wolff
circa 1903
resistance standard (1 Ohm)

resistance standard (1 Ohm)

Otto Wolff
1900
resistance standard (2 Ohms)

resistance standard (2 Ohms)

Otto Wolff
circa 1903
resistance standard (4 Ohms)

resistance standard (4 Ohms)

Otto Wolff
circa 1903
resistance standard (10 Ohms)

resistance standard (10 Ohms)

Otto Wolff
circa 1900
resistance standard (100 Ohms)

resistance standard (100 Ohms)

Otto Wolff
circa 1900
resistance standard (1000 Ohms)

resistance standard (1000 Ohms)

Otto Wolff
circa 1903
resistance standard (10000 Ohms)

resistance standard (10000 Ohms)

Otto Wolff
circa 1903
standard non-inductive resistance, 1.0^6 Ohms

standard non-inductive resistance, 1.0^6 Ohms

Nalder Brothers & Company
late 19th-early 20th Century
/ 1

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