The order clerk at Chipco had extremely good cursive writing. I find it hard to get Hvy, rather than Hex from the description on this order.

Maybe Hex was an internal Chipco code for the kind of surface texture as you indicate, but sure doesn't look like they called it Heavy. I was kind of joking when I asked about octal rather than hex in my post, but it does appear Hex meant something to the factory.

I had always kind of assumed that the surface texture was a result of continuing refinement of their process at Chipco, going from pretty rough to smooth as glass to get better graphics resolution. Are you saying the customer could have specified earlier-type surface texture if he wanted it rougher?