While that’s not a great photo looks like a mars credit board the followingy pics show the values of switches 5/6 for bonus games for 50p inserted when price of play is lower than that coin value and same for sw 7/8/9 for a £1 inserted if price per game is under a pound . Encourages bigger investment in plays
(If one game price is 60p then inserting a 50p can’t award any bonus as the game price is still not met 10p short … however if this was the case bonus at level two, the pound coin could still apply)
It’s all arranged on binary increments like you found pricing .. all off is 10p 1 on is 20p just 2 on is 30p 1&2on is 40p just 3 on with others off is 50p etc
Similarly the buses are awarded for largest coin and / or second largest coin so you can get say switch 1 on and switch 5 on that would give you 20p a game and 3 games if a 50p coin is inserted
Also if switch 1 on with switch 8 on would be 20p play but 7 plays for a pound coin see following charts 2 bonus games awarded.
Not really clear print but can be made out with the explanation ?
It follows if all 9 are off it’s 10p play 5 plays for 50 and 10 plays for £1 no bonus plays hope that helps ?
The other bank of 5 switches enable or reject certain coins FEDCB 0n accepts coins F (1) off rejects pounds E 50p D 20p C 10p. Used on maybe say a 20p pool table where inserting 50p or £ would result in lost money as the table may only release balls once with no repeat credit button available?