I found this PTR (Patrick, Thomas and Rainer - three german riders from the 80ies) frame on Ebay.
http://cgi.ebay.de/PTR-BMX-Rahmen-80-ger-J...1QQcmdZViewItem
I used a online translation for the items describtion for all none Krauts
Old BMX frame from the brand PTR from the 80ies. PTR is today known under the name HARO. It's the model “Trickstyler†a freestyle frame with welded plates on it, since there were still no pegs at that time. Very interesting thing, cause the frame has a weird style, which you can't find nowadays any longer.
end
What the hack does he mean with PTR is nowadays known as Haro. What I know it doesn't belong to Haro in any way!? Can somebody agree?
Also the fork is missing - what a shame.
It must be a really early one cause the small top tube is missing, which is usually welded to the top head tube and meets the toptwintube approximately half way on a small connection tube.
Maybe the small reinforcement tube is broke off, not really visible on the pic.
I only know the additional tube - reinforced frame style
Sometimes you can see a green PTR bike on vintage.com on the starting page. If not hit the RELOAD button of your browser a few times, then you should get it.