This exhibit is the Welsh Peanut Tube Type WT501. It features an external grid and the base was also supplied by Welsh.![](../pics/aco0090a.jpg)
The original box.Thanks to Joe Gruber for sending the images.The thin glass tube envelope is 16 mm in diameter and, including the peanut base pins, is 50 mm tall.Reference: Joe Gruber. |
Updated November 26, 2020.
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