At last a REAL 6973 at an affordable price. Not a rebrand of a "close" tube.
Electro-Harmonix tubes are all new designs and are of excellent quality. Many OEMs use relabeled Electro-Harmonix vacuum tubes in their amplifiers. If you want great sounding tubes at a very reasonable price, then Electro-Harmonix tubes should be on your list.
See matched version: https://shop.ehx.com/item/6973EH%20PL
Tube Specs: https://shop.ehx.com/catalog/addimages/6973eh.pdf