A few interesting listings I dug up on the online marketplace:
Sega "Diamond Star" -- http://www.ebay.com/itm/182445644072?_t ... EBIDX%3AIT
Mills 'M' Head -- https://rockford.craigslist.org/atq/5990659061.html
Aristocrat "Old Reno '49" -- https://detroit.craigslist.org/okl/for/5972155069.html
. . . don't know much about these machines -- reckon they were among the last of the mechanicals to be driven into extinction by the Bally EM 'meteor.' The Mills looks like a direct descendant of the old HiTop '7-7-7' model. I've seen a few of the Aristocrats pop up, the English claim they're bullet-proof. And wasn't Sega big in the video game market back in the Eighties?
Does anyone own one of these dinosaurs, or have an opinion (+/-) about them? Yeah, they're oddballs. I like Corvairs, Ramblers, and Studebaker Larks, too! Just chatting . . .