Precision Bass - AMPRO custom

[axshack]

Hi All,
yesterday a customer brought in a highly modified P Bass that has been breathed on by the AMPRO custom shop some time in the dim and distant past.

See Photos at: [url="http://www.flickr.com/photos/axshack2/5762275705/in/photostream"]http://www.flickr.com/photos/axshack2/5762.../in/photostream[/url]

Does anybody know anything about these folks, particularly just what they might have done to this bass guitar?
the AMPRO cavity on the rear does house a battery, and i believe that the toggle switches activate the pickups (I have yet to play with it) but if anyone out there has seen this setup before, or knows anything about it, I would be very grateful for the information (before I take it to pieces and give it some much needed TLC)

Regards

Dave
www.axshack.co.uk