I love seeing these GE tubes where the etch stamper was put on the wrong way round I wonder if there was a reason for it or if it was the same person in the factory at the time putting the stamp on wrong as i know of quite a few GB GE tubes with etches like this.

I've just noticed that when inserting it in and then I was like why is it on the right hand side of all things but who knows it will make an interesting feature on how to find out the date of the tubes

Its very unusual ihave to say and im yet to find GB GE with 'upside down' etch

I think I've got a F36W/35 like it but I haven't seen many.

Well whatever it is, that is what makes that certain batch of GB GE tubes extra special