I don't know for how long had Breguet been in a "dormant" state (some articles used the word bankrupt), but assuming there is no other special series, the production so far is quite low, or I should say their clientele is quite exclusive
Personally I think the Type XX is one of the best if not the best chrono in the market, considering it has:
A long military history.
Reliable and robust in-house movement with flyback complication.
A case that is WR to 100m, many other so called sport watches are tested only to 50m.
A VERY readable dial, both day and night.
The Breguet name, at a very reasonable price.
I'm also surprised to lean that the Type XX make up the bulk of Breguet's sales. I thought people who wants a Breguet typically will go for the classic style, I know I would if my life style allows a delicate watch.
Barnaby