by VintAxe » Wed Nov 26, 2008 11:49 am 
			
			Hey Nick,
Based on my literature, it looks like the Z was first marketed by Hondo in 1983. They were gone by 1988. I don't have any 1986-87 literature so I can't tell you for sure when marketing stopped.
In 1983, the base model was a H-77 and there were a variety of variations that had model numbers up to H-780. There was also a fancy graphics version that came in 3-4 variations called the H-781.
Looks to me like the model numbers and features changed every year until they disappeared. If you want info on your specific instrument I suggest you invest $10 in the Catalog Library to research exactly what you have. Given the time you spend to scrape together bits and pieces of information, the subscription is cheap and will likely answer your questions.
good luck with your research,
steve