Cerebus #23: Blurred Lines

Here's an interesting Cerebus oddity I recently purchased. There's not much Cerebus stuff I'm looking for, but oddities like this always strike a chord in my fan-boy heart! I ran offset printing presses for over 15 years so I've got a pretty good idea what happened here, but I'd like to someday get in touch with someone from Preney Print and ask them what sort of presses they were using around this time. I know Preney has been out of business, but maybe Sean or perhaps Gerhard knows a contact.