I was going through the October 1980 issue of RMC to get an article for someone, and while paging through I cam across this ad from Kadee. It really took me back to my earliest days in model railroading with the simple fascination of a working coupler like this. A huge leap from the X2f couplers I had on all my equipment.
Also interesting to note the style of the ad. Look at all that text! You never see anything like that today. A lot of information and salesmanship going on there, but times sure have changed in advertising!
Interesting to note this is the days before the Kadee patent ran out and no one but Kadee made these couplers. A point they mention. The interesting thing is that I (and many others) still feel they make the best version despite new competition. I think that only helped drive them into new products, lie the scale head coupler.
I like the line that you should use Kadee couplers because your friends are!