Hi,
here some more Infos hope can help ??
4027 and 4028 are realy the same Set but you can get 4027 in germany, too !
European Version ??
The different are only the 4028 was the US Version with 110 Volt ?!
Both Sets are from 1988-1994 !
Here a picture from 4026 !
Thx to Claudia Schott for the pic !
ENJOY !
world greets
Andi