The set was produced by Bachmann US, sold as a HO set but in fact was OO
Bachmann cloned the set from PMurphy as he did not own the rights to the parts, they were repainted Bachmann standard locos and coaches
They also released a range of the CIE Green coaches, again marketed as HO , all had different running numbers to the Murphy/Bachmann ones
The track was called E Z Track, still a bit of it about and again it was made by Bachmann
Sets came with a 110 transformer, which was removed from some sets.