Available for immediate purchase are AMPEREX BUGLE BOY branded ECC86/6GM8 NOS bulk stock tubes, made by Valvo in Munich, Germany. These were Tektronix tested spares. 

The purchase price is for one tube, there are multiple tubes available from this listing.

These have matching production codes (tN4 D4A2). 

Tested on my calibrated B&K 747B Mutual Conductance Tube Tester, with as new readings.

The tube(s) will be provided with white boxes and will be well packed to ensure a safe arrival. 

Tracking is included in the shipping cost within Canada and USA. International shipping does not include tracking.

I am happy to combine shipping costs where possible.