It appears to have a tag dated 12-57 which seems a little too early to me. The Sams I have for this GE "M5" chassis is dated 11-59.
Here's a look inside
I quickly noticed the CRT is a replacement. A 21FAP4 to be specific. The original was a 21ESP4. The 21FAP4 is pretty much electrically compatible, but has a 1" shorter neck - just like a Predicta. Now that got me thinking...
It just so happens I have another GE coaxial set which had a dead CRT into which I installed a NOS 21ESP4. The set should have a 21CEP4.
I also recently took on a Predicta Pedestal restoration job. It has a nearly dead original Phico 21EAP4 CRT.
Now here's where things get interesting because I also have a NOS 21CEP4.
So what I propose is this. Remove the 21ESP4 from my other set and install the correct 21CEP4. Install that 21ESP4 into this set and put the 21FAP4 into the Predicta.
That way, both GE coaxial sets have the correct and very strong CRT types and the Predicta gets a new lease on life. Sure is going to be a lot of work though
