New old stock General Electric and RCA 50's and 60's vintage US made JAN military issue 6SK7WA/6137 tubes. These all have the low-loss brown micanol base as shown in the photos.
This item is shipped from Britain, in North America or Asia please allow 2 to 3 weeks for delivery.
Offers on this item considered for quantity purchases.
Some of these are in commercial boxes, others in military boxes, others are out of bulk egg crates and will be packaged in white boxes. I have a roughly equal number of each brand. If brand or packaging is important to you, let me know before you buy. If you're only worried about getting tubes that work well, just buy 'em!