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Please note that this tube looks remarkably similar to Western Electric 101D, and 4102D is believed to be an exact equivalent of 102D, because Western Electric of United States opened a small office and store in London in 1883 which was named Standard Telephones and Cables Ltd. (STC). This tube is an early primitive form of triode from late 1910's and is a fine example of British triodes from early days of telegraphy and radio. This tube is to be sold as it is and no returns because of its great age (from late 1910's !). |