View Master.

While cleaning out my attic, recently, I came across a packet of View Master reels entitled, "Prehistoric Animals." I still have all of my View Master stuff from 1966-1968. A couple of years ago, I purchased a View Master projector at a flea market. I always wanted one, as a kid, but couldn't afford it. The Standard model (like my flea market find) sold for $8.95, in those days. The Deluxe model sold for $17.50, while the Custom model was $29.50! What made it "custom," I haven't a clue.