Hi All! I've seen and have had a zillion different Mac keyboards.. all with different M and A #'s. I'm currently trying to put together a mac pro a bare/empty case I bought from a guy on craigslist. I have a keyboard that says on the bottom: "Designed by Apple in California Assembled in China Model No.: A1243 EMC No.:2171 Rated 5v DC, 1A max. Complies with the Canadian ICES-003 Class B specifications. TM and (C) 2007 Apple Inc. All rights reserved" Is this the correct keyboard for the 2007 Mac Pro's? Or is this a product that shipped with the G5? I've heard that this is the same as the MB110LL/A It's the aluminium one with the white keys. The cool thing is that I paid $4 for it at a local Goodwill thrift store. Wish I would have been able to locate the mouse.