Prototype dials aren't a bad thing. Look at both the Daytona ones that have surfaced in recent years in the collection of Philipp Stahl (blue and various other variants, made purportedly by Singer but never commercially offered) or the Speedmaster one's owned by William of Speedmaster101 (again, blue and originally found by Adam from Menta in Italy). They are appealing both for their pristine condition (because most were never "in use") but also for the absolute uniqueness of their look (making them almost a 1 of 1 rarity).
The thing about this particular UG compax is how contemporary it looks. It's beautiful but its hard to date it by just looking at the dial (unlike the bulk of dials we usually see from the 40's through the 60's). Again, that in itself is not a problem but it stirs suspicion and debate.
If I were Breitling, I would try to use and position this as one of the modern day re-issues with some variation to keep it distinct and fresh. I think it would be an absolute hit, not just because there would be nothing else in anyone (or most collector's) possession, but also (and especially) given how much fanfare this has received online, not just from collectors of vintage UG (which is the bulk of us) but also those who have only a passing interest in the brand. This would also be a great nominee for said modern day reissue (think what Omega did with the gorgeous 60th anniversary trilogy) because it would not mess with or taint the heritage of a more established model (like a polarouter for e.g.).
Just imagine the Hodinkee self referential, long form articles about the lore of this dial, complete with mythmaking "history" about it's discovery and eventual usage for creating a regular circulation release from a long lost, since discovered prototype. I can't help but chuckle at the thought of it.
