The S.D. Systems Z80 Starter Kit and Applied Microsystems EM180 Diganostic Emulator are both from the Trenton Computer Festival at Mercer County College, NJ (1992). I ended up getting the Z80 Start Kit for $20 and the EM180 for $10. I had been fortunate enough to worked with the EM189 (6809) version back in the 80's. 

I'll get better pictures later. The Z80 Starter Kit was used at Mercer to teach hardware and assembly language. The unit I have is one of their kits carefully assembled by the MCC staff. Under the main board is a wire wrapped static RAM board. If you've ever done wire wrap you can appreciate the amount of work and this one is pretty.