Tested Pair of 5687WB JAN GE Audio Receiver Guitar Preamplifier Vacuum Tubes 

Made in the USA

17mm black vented pinched plates, support rods, copper rods, two spacers, halo wire getter frames and top getter flashes

Same construction

Please see the photos for more detail.

   Excellent strong balanced NOS test results for Gm:  

         66 / 68 and 64 / 69

   For Gm, 38 is the suggested minimum value

   No shorts detected

   For reference we use a calibrated Military TV-7 Tester

Estimated delivery within the USA is from 3 to 7 business days

Our standard shipping is US Postal 1^st class

We combine shipping when applicable