Interesting! The second set of numbers is 13 digits which apparently is the same length as the "FSN" code pre-1975, could relate to that somehow.
Also, someone earlier mentioned the white chip being a CPU - it's a UART. I saw that datasheet mentioning the 42 pin CPU, but this chip is 40 pins, not 42. Earlier today I found the second number is the actual part number and its a 40 pin UART that was common around that time, likely used to generate the 110 baud rate.
So...I hooked it up to the loop - no bueno. Its odd - it consistently prints the wrong stuff, meaning if I start it, let it print a line, stop it, do CR LF then start again, it prints an identical line, however its all gibberish. I don't think its a FIGS/letters thing either.
Other than printing two identical characters first (both asci/baudot have two CRs at the beginning of the message), there's no pattern that aligns to what it should be printing. I'm suspecting it's locked in ASCII mode - were there any teletypes that did 45 baud ASCII? Would anyone know how easy it would be to hook this up to a 33 to try? thing is I dont have a loop supply where the 33 is.
I may try hooking up my volpe board to the loop to see if that decodes it. If so I'll have my answer.
Jeff