I'm a friend of a collector (my next door neighbour here in Edinburgh Scotland) and he asked me, just out of interest, for fun, to calculate / confirm some winning percentages on his classic, and mint condition Jennings Governor Slot Machine...
I've been trying to calculate these winning probabilities he was wondering about (pics attached) and I am a bit stumped on my findings so hoped someone could help!...
Here's some background info:
- The guy he bought it from said previously the owner added two LEMONS to Reel 1 to decrease a player's win rate.
- But currently my neighbour's fully working, '1 shilling = 2 plays version' has been restored to its original state ie those cheeky lemons are now removed.
- I attempted to calculate both previous/current winning %'s... but the outcome seems really low (30.9% / 44.6%) compared to what the machine graphic actually states, leads us to believe?!: 'A MINIMUM OF 75%'...?!??!
- For the current version, (see image attached), I initially calculated 22.4 and then realised, when I played it, you get 2 shots per coin, so simply doubled my final winning % calculation.
So, yes, I'm a bit stumped... myself and my neighbours did some manual tests and averaged about 50% winning rate so that doesn't really help matters but kind of confirms the 44.6% winning rate I calculated but it doesn't explain why the machine itself says '75%' and I've even read on this forum that it's a very high paying machine and someone stated 80% as a pay out rate for it... very low-volatility!! (I think I used that term correctly!)
Any help would be much appreciated.