Ringo was playing a Premier, but he wanted an American made kit. I heard he had wanted a black kit, then saw the bop Ludwig and that was it. He also had them make the Ludwig logo bigger so everyone could see he was playing Ludwig, something like that, I could be mistaken about some of the details.
You're exactly right. In the mid-60s in Britain, the vast majority of young musicians wanted American instruments, which were perceived as being better than anything that you could get in England. There was a trade embargo for years that prevented US manufacturers from selling instruments to English retailers, so when American gear finally became available, the race was on to get a Fender, Gibson, Rickenbacker or Gretsch guitar. Same with drums. Ludwig ruled the roost as a result of The Beatles' popularity. Ringo was proud to have an American drumkit, so he had the store where he bought them re-paint and enlarge the Ludwig logo so people could see he played American drums. Ringo was also happy to be able to buy Avedis Zildjian cymbals. Prior that that, he'd been using other brands.
Ringo has stayed with Ludwig drums all his life, obviously. I'd say Ringo was the best salesman Ludwig ever had. Between Ringo and Buddy, they probably sold more drums for that company than anyone else. Gene Krupa did the same for Slingerland for decades.
You may notice that 60's British drummers are rarely seen playing Slingerland or Gretsch drums. Ludwig was the dominant name back then along with Premier. English Rogers drums were fundamentally different than American Rogers. If I'm not mistaken, English Rogers drums were made by Premier. I'm sure someone can either confirm or deny that.