You are looking at a three lovely, strong and matched NIB GE USA 1950's 6100 premium 6C4WA triode tubes with black plates and square getter holders. The 6135 is roughly equivalent to half of a 12AU7 and these were packed in the late 1950's. The tube printing is excellent and the boxes are in very good condition for age.

These tubes are in excellent  physical and electrical condition. The etched printed designations and production codes are clear. They measure new or better at Tube 1 - 11.6/2.3. Tube 2 - 11.2/2.3. Tube 3 - 11.0/2.2. They are guaranteed not DOA. New measurements on our AVO 163 Mk IV for the 6100 for current draw and mutual conductance are 10.5/2.2.

Please read the details below on shipping

All tubes are guaranteed not DOA. Shipping is by Australia Post and charged according to their rates for different zones around the globe. If you wish to check out the zoning and charges please visit auspost.com.au. The minimum shipping weight is 500gm, I pack tubes very well and I have only ever had one problem with damaged tubes in over 10,000 sales. There is a very small handling charge to cover packaging and handling. I do not profit from shipping and I wish I could charge less. I am a registered business and pay all the appropriate Australian taxes including 10% GST. 

Domestic shipping for this item is $12. Overseas shipping costs depend on which Australia Post destination zone your country is in. The charge stated in the invoice will be mostly worldwide, shipping with tracking is $28. Some destinations are more expensive so please Email me for a shipping quote. Shipping to the USA with tracking is cheaper at $24 because it is in a different zone from Europe. If you live in a cheaper zone than Europe I will refund the difference ASAP on payment. Please Email me to know the specific shipping cost to your country.

Please Email me if you have any questions about this item and I will reply as soon as possible.