2 Vintage NOS new in box 1940's  RCA USA Made Marconi re-branded 5X4G Vacuum tubes 

Please see the detailed pictures and info

You are bidding on a pair of Vintage New in box 1940's RCA USA black plate 5X4G vacuum tubes .

Tubes are new in box and date to the 1940s. 

Tubes feature black plates with a top side getter. The tubes were rebranded by Marconi for sale in Canada. 

Tubes have been tested on a recently calibrated Hickok TV7 tube tester with a digital meter.

Tubes test as follows:

Tube 1 : 52.8/55.9

Tube 2 :51.8/51.2

Minimum good test value on a TV7 tester for a 5X4G tube is 40. The tubes test within the NOS range.

Tubes are guaranteed to be in good working order within one week of delivery. If a tube ends up bad just send it back for a refund on the cost of the bad tube. Shipping costs will not be reimbursed .

  See pictures for details. 

If you have any questions please email.

I will ship worldwide.

Buyer to pay all shipping costs including brokerage and taxes if any.


I do combine shipping to save you costs!

See my other auctions for more vintage audio gear!

Canadian sales will be charged GST at checkout.

Local pickup in Maple Ridge BC is also available.

GOOD LUCK!!!!!!!