Its nice having the tee slots if a faceplate is required. I can only think of Toolmex, TOS and TGS chucks starting with a T, its strange that the jaws are marked, but not the body. There should be a serial number on the body to match the jaw numbers, maybe on the rear.
If you are a member of one of the forums across the pond, they might know.
Edited By old mart on 11/07/2019 21:01:33