I think grand prix has a similar delay circuit. Later though...

Hi Mark
funny - You and I did at almost the same time write about "diodes, capacitors, resistors" --- here https://www.flippermarkt.de/community/forum/threads/firecracker-von-bally-wer-erklaert-es-mir-warum-sind-kondensator-diode-und-widerstand-verbaut.212060/ in post-2 You can see "my JPG" - Gottlieb Super Soccer and Williams Grand Prix. The OP did encounter in his Bally Firecracker diode - capacitor - resistor and did ask about.
In 2017 in the german forum there was a topic about "Mystery bonus on Gottlieb 300" - I show JPGs from there.

I am not happy with the name "Delay-Relay" - I would prefer "Relay that automatically shuts-off after some time has elapsed".

The transistor in Fan-Tas-Tic is a switch --- as long in time a little bit of DC is flowing from the capacitor downwards - through the transistor - then to the left and upwards (in the JPG in post-1) --- as long in time the "switch (is transistor)" is kept open so current can flow "Coil on Delay-Relay to the left, through "switch (is transistor)" - then to the left and upwards.
Maybe (maybe ?) the Fan-Tas-Tic solution was made as they were asking an electronics engineer (state of the art) --- then they learned "we can make it less costly - without the 'transistor is a switch' ". Greetings Rolf
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