Quoted from CactusJack:
I own a German Firecracker too (and I am in the USA!). Re-import from Pachinko Palace.
Not a great game but definitely worth Saving!
Also, you mention "Bally, Green one with Casino theme" Sounds like that was an Odds and Evens (similar to Monte Carlo). That would be good for parts as it is very similar age to Firecracker.
I used to have a Firecracker re-import from Germany (with english on the playfield) that I also got from Pachinco Palace back in the 1980's.
Fun game. Has a semi random scoring feature with a light show when the ball goes into a kick-out hole.