Can someone identify this top box mount?

[Travlr]

I bought this off ebay.  The mounting brackets fit a Breva 11-Sport 1200 or Norge.  They fit fine.  What I can't identify it what brand of top boxes it fits.  Neither my Givi or Shad will work.  If you enlarge the image and take a look at the mounts there are two sliding ones on the back and a large hollow tower on the front. 

Thanks in advance for any help!

Mike

[Arizona Wayne]

It's probably an Aprilia/Piaggio top case mount like my 250 MP3 has which is quite big.

[gvw]

Looks like the OEM I have on mine but I can check when I get home. 

[mojoe]

looks like a KAPA mount we get in Europe?

[Sheepdog]

Piaggio top case rack pictured below. It is similar, but lacks the locking tower on the rear...

[Arizona Wayne]

I just looked at my Piaggio top case mount and yes,  it's different than the 1 we are trying to match, but I've seen a top case just like my Piaggios either on a Norge or Aprilia bike recently, and my mount doesn't look much like yours.  It's narrower than the 1 we're trying to match, but it has the tower/locking feature like the 1 we're trying to match.     Since Piaggio owns Aprilia and Moto Guzzi too................