Identify this vintage reisistor

This resistor was removed from an old HP signal generator. I have found it to have a wonderful effect on the overall sound of my system. It brings the warmth without a large loss in detail and highs. Keep in mind this is true in MY system. Does anyone know what type it is and the who made it. Does anyone have any of these? I would take one apart to solve what type it is, but I haven't any spare ones. Copper leads and non magnetic.
 

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