Yes, that was the first time I had a 'proper' processor to play with. A Dragon 32 (CoCo clone from the UK).

I've never seen Tandy used outside of Europe but then again, I had not traveled as much then as now so it's definitely possible they used the brand on other continents as well. I wonder how many trees were cut for those catalogs :)

And AU. Dick Smith started out selling Tandy's, before switching to their own clones.