I started in 87 and I too had a big yellow bag although myine was made by Tusa. Still got it in the loft somewhere.
I was forced by SWMBO to take my first ever cylinder to the scrappies the other day, 7l with pillar valve and moulded black backplate with 1 piece harness (very DIR

)
Still got my first set of regs. US divers. 1 first stage,1 second stage (in metal) and SPG. I wouldn't part with them.