Do you own an Intervec Horizon or Falcon?
We owned an Intervec Horizon back about 35 years ago and have fond memories of our travels. Recently, I was cleaning out a storage box of old papers and discovered the original brochure the dealer gave us and I thankfully kept it all these years.
If you would like to have a copy, PM me with your email address and I'll send you a copy in pdf form. The brochure is well done, lots of pictures and nice drawings of all models of both Horizons and Falcons. Also, the brochure lists all options offered back then as well as (most importantly) the specs on tank size, etc.