Interesting.
You may have something good there.
That is a US Air Force marking.
Not sure what TBX means.
I'm pretty certain that it is 1950s now, from the profile, maybe even late 1940s.
You should post this in the "What is it" section here.
Hi,
Did some research and the only thing I can find out is, the company is called Hubley, TBX USAF Air Force Jet, I think from the 60's / 70's
They make real military planes and cast iron toys too.
But so that's all I can find it's a cool jet, sorry I couldn't find any more.
Hope this helps??