It is a sought-after collector's item. This was regularly used somewhere in the 1980s, and I bought it secondhand and have only used it for brief periods.I've just given it a complete checkout and have replaced the AA cells that serve as backup. In addition to the Hayes manual, I include a schematic diagram (from Bitsavers, with the graphics somewhat touched up for legibility) and some "quick start" notes. The item "Hayes Chronograph tested, working, with manual and schematic" is in sale since Tuesday, August 18, 2020. This item is in the category "Computers/Tablets & Networking\Vintage Computing\Vintage Manuals & Merchandise".
The seller is "covington-innovations" and is located in Athens, Georgia. This item can be shipped to United States.