Reverser Identification help (Powers/Riley?)

Can anyone help me identify this reverser? My friend who owns it was told it's a Powers and Riley.

http://picasaweb.google.com/red66chevelle/Reverser


Thanks
Chris

 

The fully machined surface looks like (an old) B&J... but that's all I got....

 

Guys, I am looking for a Powers & Riley reverser to finish my restoration. I own the Powers & Riley 1968 Wynns Winner AA/FD UDRA world championship. I spoke with Dave Powers last year on several tech issues but still looking for the reverser in which this AA/FD was the first to have it. Thanks for any help on this