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
LEGO 6894 Blacktron Invader | BrickEconomy
LEGO 6894 Invader Set Parts Inventory and Instructions - LEGO Reference Guide
Vintage Lego Set 6894 Blacktron Invader - toys & games - by owner - sale - craigslist
Blacktron Cruiser, 40580 – Atlanta Brick Co
The LEGO parts you need to build a mini 6894 Invader – Blocks – the monthly LEGO magazine for fans