Amperex 6DJ8 tube construction

i am not knowledgeable on the fine points of how specific vacuum tubes are constructed, perhaps there or others that can comment who have more knowledge

i would say, having a fairly vast connection of such tubes of various brands/makes from us europe japan etc, 6dj8, 12au7, 12ax7, 6fq7 and so on, that both types of construction you show via the link are quite common... i see more of the ones with the ’intermediate horizontal plate’ leading up to the suspended getter on somewhat later iterations of the various tubes, perhaps it is to make the tube more robust against mechanical shocks and not go microphonic or worse

Left one is Amperex Holland made and a great tube, the one on the right is a Matsushita made on same tooling as Mullard but a different tube.
Always check the etched codes at bottom of tube to identify the origin.

'Made in Holland' is silkscreened on the one on the right. It matches several other ’Made in Holland’ silkscreens on NIB/NOS Amperex 6DJ8 orange globes that I purchased in the original yellow/green boxes, years ago. There are no date/factory etchings on these tubes in the original yellow/green boxes. There are etchings on tubes, similar to the one on the left.

I agree the one with the extra plate may be a ruggedized tube.
Does the left tube have the same Amperex logo? This is a guess, maybe the tube on the right was made in a Mullard plant and branded Amperex Holland. That happened sometimes.

I think the circular plate is called a splatter shield. I don’t know what its function is.

Tubes from the Phillips factories (Amperex, Mullard, Siemens, La Radiotechnique, Valvo, etc.) made in one factory often carried the label of another Phillips factory. I have lots of examples of this.

The only way to be sure where and when a Phillips tube was made is to read the etched code. Sometimes part or all of the code is unreadable. I can see the delta etching on the tube on the left, which means it was made in the Heerlen Amperex factory. You would have to talk to someone a lot more familiar with tube construction than me to find out where the tube on the right was made.

Here is a link to the Phillips codes if anyone doesn’t have them:

https://frank.pocnet.net/other/Philips/PhilipsCodeListAB.pdf

The tubes we’re discussing and any we’re likely to come across would have the ’NEW’ CODE etchings.