I'm not sure how much beer was imported to the US but I know we had massive amounts of UK ales imported to Canada around that time. People up here find these bottles by the bucketload. From the UK bottle digging videos I've watched I think they may be more common here than in the UK itself. I imagine a fair number were imported to the States as well.
On second look the first green one is a bit unusual for an imported UK ale, it might have been something else (I suspect it's still British). The other two look exactly like the ones that are everywhere in Canada.
Ok thanks! These were found in Rocky Mountain region of the US. This area had a booming coal industry during the early 20th century. Wonder how UK bottles got here?
imported Welsh coal miners drinking what they were used to? Think of all the Chinese bottles found either on the west coast or where the railroads were punched through. Immigrants brought language, customs, religion, and food and drink habits with them, amongst other things.
All these bottles look like Britain or empire to me. Those ale bottles seem to show up just about everywhere. I've seen them up here in the northeast.