I opened a very dusty cupboard, and look what I found

it looks to be a line current version, perhaps over the weekend I will clean all the dirt from the machine, and then delve into the electronics to see if it can have a short play on I-Telex.
I think it might be ex Reuters - there are a couple more Transtel machines at the bunker (they all really do not belong there, but the owner will not dispose of them)
At least they have a home safe from the scrapman