Well, I was a steenkeen civilian defense contractor who worked with the military back in the '60s and '70s but I did drink a few beers. The going price during those years in most bars in Udon and Pattaya was 10 baht or 50 cents in US money, equivalent to 19 baht these days. Bangkok bars did charge more but CRS anymore. About 20 or 30 baht, I suppose.
Brands? Singha and Krating Thong. No foreign brands.
Not too many drank the large beers in those days in bars, that I remember. That 5% alcohol content or whatever it is would (still does?) wipe you out after 4 or 5 of the Beer Yai's. Made for a short night out if you drank one or two of those in each saloon.
