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Would anybody recognize who manufactured those 0A2 regulators?

Since I use them quite aggressively, I picked at MIT's fleamarket a few dozens of them dirt-cheap. The tube looked suspensions. Then marked as Amperex, Made in England and National Electronics, Made in England and came in original boxes. On the picture they are 3 tubes in the middle.

The suspensions  tubes have identical construction, very “third-country-like”, contemporary-looking legs and very modern printing.  Most likely someone faked them. The original Amperex has totally different construction (the tubes on the left).

Initially I thought that they might be Russian-made but the Russian’s VR150 are totally different (the tubes on the right). So, did anyone come across those tubes and have an idea where they might come from? The forged tubes do regulate perfectly fine and even sound better then few others (not the best among all though…)

Thanks you,
Romy the Cat

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