Let’s face it: When it comes to collectibles, scarcity is key. Most luxury watch brands have been wise to this for some time. Every now and again, they release a variant on an existing watch, in extremely low numbers, to specific boutiques around the globe. These "Boutique Edition" pieces tend to sell out quickly, and once they’re out the store door, good luck tracking one down. There’s been a lot of activity in the world of boutique editions this past week, with the first four watches on our list having been announced within the past 24 hours. If you’ve already secured all the standard pieces you wanted in your collection and happen to be in the market for something a little less ordinary, any of these watches will give your collection an instant boost in street cred.