Nuova Bell Games
Nuova Bell games is an italian pinball company that existed in the 1980ies.
The company started as Bell games and made conversion kits for Bally pinball games.
The history of the company can be found at this website, written by Frederico Croci.
Click here for an overview of games made by Bell games. Technically they are identical to the Bally games of that era, so quite easy to repair.
The company later changed into Nuova Bell games (Click here for an overview of games made by Nuova Bell games) and these all have their own custom boardset, no more kits for Bally pinball machines were produced.
Here are some pictures of a Cobra game:
Note the black box that is a +5 volt regulator. This fails on a lot of games.
Here are some pictures of the custom boards of a Bell Games Saturn 2: