Auction is for two (platinum matched pair) of extremely rare and great sounding Siemens ECC40 rebranded Philips round plates double triodes.
They are branded Philips and they come in original boxes.
I had more than 100 pcs of these tubes, and all pairs I have are carefully tested and matched by plate current on my Metrix U61-B tester. Due to big number of tested tubes, they are matched within 5% or less!!! They are tested with 250V on plate and -1.5V on G1.
See also my other auctions and visit my eBay store for more vintage tubes and tube parts. More than 250000 tubes in stock and more than 35 years in tube business.