This listing of three (3) new old stock, new in box RCA 6CD6GA Beam Power tubes is as follows:

Tube One:  Tests 58 (116%) RCA stenciled on base with code LW. 6CD6GA stenciled on glass. Black plate. Top halo getter. Chrome Dome.
Tube Two:  Test 58 (116%) RCA stenciled on base with code MB. 6CD6GA stenciled on glass. Black plate. Top halo getter. Chrome Dome.
Tube Three:  Tests 66 (130%) RCA stenciled on base with code BD. 6CD6GA stenciled on glass. Black plate. Side halo getter. Side flashing.

Tested on TV-7/U where minimum is 33 (65%); new is 50 (100%). 

All three have an O getter as described above, black plates, good flashing and their boxes. 

Tube ships via United States Postal Service (USPS) Ground Advantage with tracking for domestic U.S. sale; Priority Mail is an option if you wish your package 
delivered quicker.  International orders ship via International Shipping service.  Package weighs fifteen ounces (15 oz.).

Combined shipping always welcome.

TRANSIT VIA POST CAN DAMAGE TUBES.  THIS IS NO FAULT OF OURS BUT THE THIRD PARTY ENTITY THAT IS DELIVERING ITEM(S) TO YOU, I.E, USPS, UPS, FEDEX, YOUR NATIONAL CARRIER IF INTERNATIONAL, ETC. PLEASE INSURE THEM! WE CANNOT GUARANTEE FAILURES ON YOUR EQUIPMENT AFTER POWER UP AS THERE IS NO WAY TO ASCERTAIN HOW TUBES WILL INTERACT WITH YOUR ELECTRONICS; NOR IS THERE A WAY TO DETERMINE WHETHER THEY MAY HAVE FATAL FLAWS IN TUBES THEMSELVES!  THESE ARE OLD VACUUM TUBES AND TIME MAY HAVE TAKEN A TOLL ON THEM OVER THE MANY YEARS SINCE THEY WERE MANUFACTURED.