BrickLink - Part 2685b : LEGO Monorail Coupling Long (Sets 6399 / 6991) [ Monorail] - BrickLink Reference Catalog
BrickLink - Part 4760c01pb05 : LEGO Electric 9V Battery Box Small with Airport Shuttle Pattern on Both Sides (Stickers) - Set 6399 [Electric, Battery Box] - BrickLink Reference Catalog
BrickLink - Part 4760c00pb05 : LEGO Electric 9V Battery Box Small Without Battery Cover with Airport Shuttle Pattern on Both Sides (Stickers) - Set 6399 [Electric, Battery Box] - BrickLink Reference Catalog
Airport Shuttle : Set 6399-1 | BrickLink
6399 Airport Shuttle from BrickLink Studio
LEGO Vintage Airport Shuttle Monorail #6399 from 1990's - Hard to find!
6399 Airport Shuttle - South African Fans of LEGOⓇ
LEGO 6399 Monorail Airport Shuttle | BrickEconomy
Vintage LEGO 6399 Airport Shuttle Monorail Train classic set from 1990 - YouTube