I found this old king trombone in my dads storage can anyone help identify

We're going to need more to identify your trombone. A picture or three would be great, but at the least we need a few details:

1. What engraving is there on the bell?

2. Is the brace that goes to the bell from near where the parts join curved as it approaches the bell?

3. Does it screw together or does it just connect using friction?

There are more things that could help, but I don't know how much you know about trombones.