To save costs, Bally produced some machines during 1985-87 in Germany, FIREBALL! CLASSIC being the 1st one.
These machines have another front-door and some of them feature the Bally-Wulff-Logo on the cabinet.
The german Fireball! Classic was produced with a cheap modern front-door but also with the classic Bally-chrome-front-door which ironically was introduced in 1972 with FIREBALL and was used the last time with the german Fireball! Classic (most likely to get rid of NOS-doors)