9 vintage 6SN7-GTA “chrome dome” tubes. All were made my Sylvania with Sylvania data codes. 4 are labeled Sylvania. 4 are labeled Philco and one labeled Motorola made by Sylvania and sold by those companies. They have a rich, clear sound with solid bass. All have a 3-hole T black plate structure and sound similar to the 6SN7W. (They do not have the 6SN7W support posts.) These tubes were manufactured in the ‘50s and ‘60s and will sound more musical than any current production tube.All tubes tested GOOD on my Hickok I-177 calibrated military tube tester. About half tested at NOS levels but are used tubes. $150. If you pay with PayPal Friends and Family, I will include free USPS Priority shipping within the continental US. All questions welcome. Please read my feedback and buy with confidence. Canadian customers: Please add $40 USD to cover additional shipping and PayPal costs. No matter how secure the packing, the less time 50+ year old tubes spend bumping around in transit, the better they will sound when they reach you. My best experiences sending tubes to Canada in these times have been USPS Priority International shipping. It costs more but your tubes will arrive safely and in a reasonable amount of time. 6-10 days. You will also get $200 USD insurance included in this price. Thank you for your understanding. My ZIP code is 04106
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