Svetlana Winged 6550C NOS Box of 25

I am selling a box of 25 unused and untested Svetlana 6550 C tubes that I purchased 4 years ago for spare backups to a pair of Audio Research Ref 300s that I later sold.  I purchased two boxes for a total of 50 and wound up using 8 from the second box in an Audio Research VT130SE amp that according to Nick Gowen of True Sound tested strong.  Bias was rock solid with the tubes in this amp and the sound was spectacular.  Now that I have sold my last tube amp, I am reluctantly letting this and my other box of 6550s go.  Rating is conservative at 8/10 since I unfortunately do not have a tester to verify condition of the tubes.  Based on my experience with the 8 from the same batch used in the ARC amp however, these are in great condition.  Price reflects untested status and tubes are ultimately sold as is.  I will ship to verified PayPal address in the lower 48 states.  Buyer pays associated PayPal and freight charges.  Thanks for reading this ad.