-I have four quad sets of New, NIB, NOS Winged C EL34 tubes that I would like to sell. -These have a 2011 date code, and are matched for Gm and idle current. -Each quad set has been run for an hour in my Marantz 8b amplifier and these tubes have no sign of gas. -Recently I modded a friends Reissue Fender Twin Amplifier from 6L6GC tubes to EL34 output tubes. The Winged C EL34 sound magical in this amplifier, as the also do in my Marantz 8b and Dynaco Stereo 70. -Shipping charges to be actual charge for insured shipping. -Thanks, Bruce