Glad this 75 year old tube hadn't gone to air. It has a 54 degree deflection angle. So far as I know,it has never been re-juvenated.
Did you see Banderson's video of the dissection of a 12LP4?
https://www.youtube.com/watch?v=qPj4jpaTdqg
If you're wondering about the blue and yellow, there's a lot of blue and yellow around here. I'm the sponsor of a Ukrainian refugee girl. Got her thru the USCIS.Gov I-134 program. Saved her from the bullets and the bombs.
She knows perfect English.