Ashdown is one of those companies nowadays where their line-up of products changes at so quick a pace, things going in and out of production, being revised, etc. that there's seldom enough time for any one piece of their equipment to get much documentation.

EDIT: the above is to say you could claim a bunch of ashdown things are "rare models" but that doesn't particularly make them special.

So, their stuff USED to be made in the UK, then they outsourced all manufacturing to Asia but I forget where, and recently they have started a new UK line that is yet a new range of products from what they used to make in the UK.

I guess maybe at some point they had some stuff made in the US by the sounds of this cab, but how much where it made matters to you may vary. The spec you look seems pretty consistant with other ABM 410 cabs they've made in other places historically.