I’m not surprised, geeker. My dates were slightly out, sorry. It was apparently the biggest selling keg beer in the world in 1966. But the export version was a bit stronger. 5.2%, I think. Original Red Barrel just 3.8%. The brewers were convinced cask ales would be extinct by 1980, but drinkers and CAMRA (the campaign for real ale) held back the tide of progress. Watneys had nailed their colours to the keg mast and soon sold out.
I spend 6 months in Northern California in the early 80s and recall how dire things were then. Samuel Adams was about as good as it got, as I recall. I flew across on BA with a 40 pint Rotokeg from London to San Francisco on my lap so my brother, who was at Stanford, could brew his own. Happy days!