Didn't think any Epis come stock with the Nashville bridge.
Gibson Les Paul Standard does.
The Gibson Les Paul Traditional doesn't.
https://menga.net/les-paul-bridge#:~...%20the%20neck.
In any case, my Gibson guitars don't. They have the standard ABR-1 style tune-o-matic, which is more common.
Does the Trembucker fit in a standard Gibson pickup ring? Not sure that they do.
Epiphones use a saddle spacing similar to modern Gibson spacing.
The ABR-1 is not "standard" across the board, and it is certainly not "more common." It was back in the old days, when it was pretty much the only option. But the vast majority of Gibsons built since the introduction of the wider spaced bridges have...wider spaced bridges. We're talking probably 40 years now that most standard production Gibsons have come with a wider spaced bridge.
ABRs have become slightly more common since the bankruptcy, by popular demand. But by far the vast majority of Gibsons that are out there in service at this moment are equipped with wider spaced bridges (as are Epis).
And again, Gibson themselves provide wider spaced bridge pickups, unless the pickups in question are "vintage" style, e.g. a '57 Classic. These are 0.2 mm (less than 0.008 inch) narrower in pole spacing than TBs, IIRC.
Trembuckers will have fitment problems on some rings and not on others, largely depending on whether or not the pickup is covered. You just use TB pickup rings if there are issues. This has nothing to do with whether or not the poles match the string spacing, which is what we are talking about.
Stating that regular pole spacing is the right visual spacing for Gibsons and Epis across the board is going to lead most Gibson and Epi owners in this day and age to choose the wrong pole spacing for best visual alignment of the pole pieces. It will line up OK on certain Gibsons that are in the minority – models with "vintage" saddle spacing, mostly.
It's really as simple as: Don't swallow generalizations that you read on Internet forums.
Measure your string spacing over the pickup. There have been different bridges used on different models and/or at different times.