That valve spring compressor could be used for many different flathead / side valve engines. It will not work on Ford Flathead V8's tho. I have used that type of tool many times working on older model forklifts using Chrysler 251 and 264 CI six cylinder engines.
So, it is antique. I haven't found or matched the exact number, but found a listing for Model T/A by Endestro. I think they mean Indestro which began in the late 20's which would make it a tool for a Model A? Now, to see if I can find the model number.