Here are three (3) new old stock, new in box GE-made, Zenith-branded 33GT7 tubes for your equipment needs.  Gray plates, dual side halo getters and
two have matching codes of 71-35 188-5 and other code of 72-17 188-5 stenciled on side of glass and 33GGT7 atop glass.

Tubes 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 thirteen (13) ounces.

View my store for more tubes for your needs.

Combined shipping always welcome.

TUBES ARE GUARANTEED GOOD AND IN WORKING ORDER AT SHIPMENT. 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 USED VACUUM TUBES AND TIME MAY HAVE TAKEN A TOLL ON THEM OVER THE MANY YEARS 

SINCE THEY WERE MANUFACTURED. WE CAN ONLY TEST FOR THE PARAMETERS MENTIONED ABOVE IN ONE OR MORE OF THE FOLLOWING EQUIPMENT WE USE FOR 

MEASURING:  HICKOK 600A, HICKOK 800, MAXI MATCHER & MAXI MATCHER 2.