Is that an original A1000 or GBA1000?
I have never heard of Z3 on an A1000.
There has not been one yet, but I still want one! My Byte by Byte PAL expansion is an interesting relic - it was, I believe, the first expansion, even before Commodore. It's actually Zorro I (yes, One) and was built before CBM had finished the A2000 design - they supposedly worked with CBM to de-bug and implement the concept of Amiga bus-based expansion. The hardware designer, with his name imprinted on the circuit card, is Brad Carvey, Garth's brother
, who later went on to help design the Video Toaster.
Edit: Probably most don't even know Byte by Byte made hardware. After the drama of Amiga expansion, they got out of hardware completely and into 3D software that is well known, Sculpt 3D/4D.