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Re: Large base Mullard....

YES
Thats what they look like but they are later than the 50s and 60s because the xf1 mullard gz34 I have has a large base with a hole in center pin and these dont..See if yours have the hole in them..
The metal base ones were made by phillips even tho mullard and amperex both marketed them..If you look at the metal base ones they have no ribbing in the plate structure as the mul/amp ones did and they were all made in holland I think.


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