One tube IN-18 clock on eBay

[Paul Andrews]

I love this approach of making the form factor be the same as the tube: https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F253252319616

Not affiliated in any way with Kosbo.

[Terry S]

I nearly bought that clock some time back, because I had an enormous faux light bulb shaped glass container I thought it would go into nicely. But the diameter was just a ~hair~ and  I do mean a hair... too large to fit thru the opening...