i think that is a more modern uniform coat button...
For police uniform coats...
I seem to remember my first nylon popo jacket had similar buttons...
Yes like others said, its a generic police button. The P in a wreath was used as far back as the 1800's.
umrgolf,
If you feel this is solved,
Go back to your original post,
Click on Modify,
Click on Message icon down arrow,
Click on Solved,
The Green Check will appear
Here is a photo tutorial to help you through that process.
http://forum.treasurenet.com/index.php/topic,259097.0.html