Airain, the heritage watch brand that made a triumphant return in 2020 with their Type 20 reissue, is back with a new spin on the popular (and historic) chronograph that gives it a sleek and under the radar look. Airain, you might remember, is one of the original French manufacturers of the Type 20 chronograph, the military aviator?s watch issued to French pilots in the 1950s and 60s. Several watchmakers were contracted by the French Ministry of Defense to produce the watches to spec, including Mathey Tissot, Dodane, and, most famously, Breguet. Vintage examples of the Type 20 are highly collectible, and Breguet of course still produces a variety of excellent chronographs under the moniker. Brands like Hemel and Massena LAB have also gotten in on the Type 20 action recently, which might harken a boom in interest in these very specific chronographs. 
The specificity, I think, is part of the charm. Like other watches built for military purposes, the Type 20 was made to a certain standard, with certain key features, regardless of the manufacturer that actually produced it. In the case of the Type 20, those requirements included a black dial with registers at 3:00 and 6:00, giving the wearer the ability to time events up to 30 minutes in duration, along with a 38mm case diameter, a rotating 12 hour bezel, lumed hands and Arabic numerals, and accuracy to within 8 seconds per day. The other key feature was that the chronograph needed to have flyback functionality, a re...