Well, when one considers that in the 18th century, America was still sparsely populated and in the UK, by comparison, a very large middle class population that needed/wanted/demanded all kinds of material goods, furniture being in that group, it's easy to understand how that trade developed. By the 1960's it was a BOOM time for that business, there just wasn't enough American antique furniture to meet demand so hey, lets just import from the mother country and make everybody happy!