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Also: I've made an update to the page showing how the percentages change if the jackpot is assumed to be 100 coins. Since the change to the percentage is linear, that can be used to calculate the percentage for any value of the jackpot. Since my method of calculation appears to be novel, I felt it u...

I have a little web page about slot machines, at this page: http://www.quadibloc.com/math/sloint.htm On that page, I work out the house percentage for the regular Futurity (16.01%) and the Futurity Gold Award (27.25%). This excludes the jackpots, though. This was something that could be done using p...

I've encountered this web site before. I found it a very interesting resource; reading the page on the Aristocrat collection was very informative, as most of the books on slot machines I've read have concentrated on American makers.

I see it wasn't mentioned in this thread yet: the reason for the dual 10-stop arrangement on the early Mills BONUS machines was simply so that players would have to wait 10 spins before getting BONUS at least, instead of getting it in five spins if they were very lucky. However, since the chance of ...

This has got to be the worst Beromat conversion ever produced in the history of slots, probably has Formica sides and should have been left in the barn! In a different forum on this site, I found that machine; it turns out that instead of being a Beromat conversion, It is called a Sterling, one of ...

It's true some Caille machines had strawberries as a symbol. On this one, the strawberries replace oranges, the crown replaces the bell, and the Silver King replaces the bar. The crown makes me think of the 6 Fruit 6 Rotamint, and the Silver King makes me think it came from a Silver King Casino some...

Incidentally, although I had previously seen the French site that documented the Mills Bonus machine, the URL in the post above mine for it is no longer valid. I've added, therefore, more detail to what was a brief description of the Mills Bonus to my own page. And now I've updated the page further ...

Obviously, if the jackpot took every coin, and never overflowed, all the coins played would eventually come back to the player. So in the case of the jackpot taking every coin until it is full, you must take overflows into account. One way to do it is, as you mentioned, to use the capacity of the ja...

The Mills Futurity certainly would seem to qualify as a rigged slot machine. Usually, it works as a 10-stop machine, paying out only about 20% of the money that comes in. On two of the ten spins as the meter moves towards refunding the player's money, however, it gives back twice as much money as is...

I don't think there ever was a fixed percentage payout in the pre electric days I don't see how that is possible, on a machine with random stops and a fixed order of symbols. You can have a probability of winning but not a fixed percentage, not for certain. You are quite correct. However, the amoun...

This info is from Daniel Mead's "Hand book of slot machine reel strips". I don't have a copy of that book at the moment, but I have one on order. Thank you. In the case of the Jennings machine, though, even less than an exact match would be helpful. As noted, the machine pictured in Diete...

Thank you, that's one possibility I hadn't considered. However, the arrangement as described returns 75.7% of the amount wagered to the player. As well, the Mills SP reel strips differ from it in this way: exactly one orange is replaced by an additional lemon. I suppose that doesn't eliminate the po...

I am familiar with both Rick Frink's catalogue (and his site on sites.google.com) and the site https://www.slotmachinereelstrips.net/apps/webstore/ but while I have found near-matches in the former, neither has yielded an exact match to what I'm looking for. A number of books on gambling have illust...