LEGO 6894 Space -Blacktron I - Invader nincs leírás hiánytalan, gyűjtő - Zalaegerszeg, Zala
LEGO 6894: Invader | Brickset: LEGO set guide and database
LEGO 6894 Blacktron Invader | BrickEconomy
LEGO 6894 Invader Set Parts Inventory and Instructions - LEGO Reference Guide
After digging through a box of gifted LEGO for hours and only one piece of the instruction booklet left, I finally completed this. 6894 Blacktron Invader : r/lego