Recently pieced together this old pneumatics set from 1984 from a used lot so I thought I would compare it to some of my more modern pneumatic sets : r/lego
LEGO Technic Excavator (8851) original instructions manual | eBay
LEGO TECHNIC: Excavator (8851) for sale online | eBay
Technicopedia: 8851
Lego Technic, Lego 8851 – dba.dk – Køb og Salg af Nyt og Brugt