I know the discussion is focused on classic reels, but they made their Mirage reel in house. I believe they just announced that is ending though and will be outsourced to S. Korea.
It depends on how you define "in-house," which is usually thought to mean "in the same company building(s) like where they make their rods...
The Mirage reels and the new CFO's are made by an independent machine shop in Vermont for Orvis. The same shop also makes the nippers, pliers and newest iteration of the CFO. Unless Orvis recently purchased that business, the reels are made in the USA, made in Vermont, maybe even made in Manchester...
However they are still "outsourced."
Even the "original" Orvis reel, the Orvis Patent 1874 was made for Orvis by Manhattan Brass & Manufacturing Company so this is nothing new, at least for Orvis. But let you heart not be troubled; unless something has changed recently, even venerable reel makers like Hardy follow a similar practice...
The last time I inquired with the "home office," since Hardy brought back a majority of the classic reel production to the UK, the machining has been done by a machine shop in Peterlee (50 miles away) who machine the bar stock first before sending them to Alnwick for assembly.
That's too bad about the Mirage...
I wonder if Orvis will pull the same crap as Hardy when they did the same with the Classic Reels in 2007; only slightly dropping some prices while leaving others at UK built highs...