Allow me to add to the confusion -- here are my 2 A1000s:
XM1127283, NTSC, piggybacked Rev. 6 mainboard, PSU from Sept 1985
XM1188378, NTSC, piggybacked Rev. A mainboard, PSU from Febr 1986
The one from 1985 is guaranteed to be 100% genuine, as I personally imported it from the US shortly after its release, complete with matching A1080 NTSC monitor. It cost me an arm and a leg, but I took pride in being one of the first Amiga owners in Holland. Even Commodore Netherlands didn't have one yet.
I eventually added Kickstart 1.3 in ROM by removing the daughterboard, moving a chip or two, (un)cutting a couple of jumpers, removing the 2 bootroms and adding 4 EPROMs 27C512. I also did the obligatory PAL conversion hack by swapping the Agnus and changing the 28.6363 MHz clock oscillator to 28.375 MHz.
Commodore performed the same NTSC to PAL hack on their early PAL machines. They also reconfigured the MC1377 by changing a few of its surrounding components. Yet the composite video output of those early "PAL" machines was still only B/W.
Both machines have been fitted with Amiga "checkmark" badges. I wonder if any A1000 has ever left the factory carrying the ultra rare boing ball badge. I dare to believe that any occasional boing ball badged A1000 out there was rebranded by its owner.