Which needle do I have?

Thanks. That was what I was thinking but wasn't sure.

If it's 25 years old and standard out of the box, it should be of the "old" type and have a 0.5mm tip/needle setup. 

I believe the 0.8mm mentioned earlier is used in the "NH" series.

Look at Don Wheeler's website. It might be there. Also, it isn't rocket science. I mean no disrespect, but try it as you have it and see if it works.

Nope, no markings that I can see on the needle or brush body except for the Name, Badger Air Brush.

I looked them up and saw 0.3 and 0.5 but I must have missed the 0.8 so if I do have either the 0.5 or 0.8 I'm good to go.

Guess I'll just have to try the new stuff out and if it works  I'm ok, if not then I'll have to order a new needle.

According to Badger, the medium needle for the 200 is 0.8.  Are there any markings on the non-pointy end?