The original Mullard vacuum tubing produced by Mullard was finished in the 1970s and now it is hard to find individuals in good condition and very expensive, even if you found it.
The New Sensor (NS) is a company that carries SOVTEK and Electro-Harmonix brands, and has been repeatedly reissued Mullard vacuum tubing through extensive research, research, and prototypes.
Country of Manufacture: Russia.
Other than the electrical characteristics of the product (damage to other devices, bulb tilt, valve height, logo missing, etc.) are not covered under the warranty.