Selling my Quad matched Philips XF2 dual halo (00) MiniWatt EL34 Tubes which I used and worked perfectly on my Headamp BHSE (BHSE sold a while ago). These are rare and highly sought after Quad set of tubes. Tubes from person I bought them from in 2017 stated that they were part of a big NOS lot in bulk package (no original box) which turned out some time ago. The person I bought them from had purchased ten units of which I only used one quartet on his Fisher power amplifier. The person I bought them from stated "quartet I am selling has no use on it apart from having been tested on my B&K 707 tester. Values are around 110% of average "new values" and pretty close to each other". I used them for about 100 hours on my BHSE. I have marked on the box lids the position they were located on the BHSE. They are all in excellent condition and I had no issues with using them on my BHSE. Pictures were taken on 22 Sept 2019 of each tube. Had all Tubes tested second week of October 2019 and all Ok. See photo of test certificate which will be provided with the Tubes. Additional Information from Tube Tester (Keld AmpWorks) Keld Ampworks has confirmed via an email (08/12/2019) that my Tubes have plenty of operating hours left in them as the readings on the certificates (attached) are 9 and 10. Keld Ampworks states such readings are compatible with new off the shelf Russian and Czech EL34s. Keld Ampworks also states that a reading of 6 shows a worn but still functioning Tube. [/COLOR] Selling this Quad set for (NOW SOLD) excluding postage costs, postage insurance and PayPal fees which will need to be paid for by the Buyer. I will post internationally via Courier (Buyers choice of Courier) in the boxes they came in when I bought them and will well and securely pack them in bubble wrap and a strong outer box, but due to the fragile nature of tubes will not be liable for any damage of the tubes during the postage trip.