Helmut Schein is a business with locations in Chinatown, Liberty City in 1998, and the Vice Point Mall, Vice City, in 1984, during the events of GTA: Vice City Stories. Although both locations are inaccesible by the player, if you peer inside the Vice Point Mall location, you can see furniture, such as tables, couches and even a refrigerator, suggesting it is a furniture store similar to KLÜNT.
The Vice Point Mall location as of 1984
Helmut Schein is a play on words for Helmet Shine.