Anyone seen one of these before? A Proco Rat2 with a Brat serial number.

[guitargasdotcom]

Hi guys,
I got this Rat pedal ages ago and I am finally getting round to asking this Q.
It looks like a Rat, sounds kinda like one but the serial number on the back says it's a Brat?
Anyone seen this before.
I did write up a post on my blog with some pics and a video, so I'll repost them here...
The vid
https://www.youtube.com/watch?v=5BD3okIkD5M
and the pics...

Here is a pic of an original '95 ProCo Rat2 with the LM308 chip that I also have.

more pics of the two pedals can be found here...
A ProCo Rat2 thats a Brat?Guitar GAS
Any help identifying whether it's a Brat or a Rat would be greatly appreciated.