Store collaborations have become a rarified item among SB Dunks as the folks at Swoosh-boarding have resorted to in-house creations rather than hooking up with the purveyors of products. This April, Premier Skateshop of Michigan will unveil its own collaboration with Nike Skateboarding in the form of an SB Dunk Low; to throw some hints at us, Premier throws us a few teasers shots of an SB Dunk Low silhouette and a picture of a polished petoskey stone, which is composed of fossilized coral native to the Michigan region (which is also where Premier is conveniently located). To put all the pieces together, this SB Dunk Low is very similar to the Grey/Black/Blue SB Dunk Low we previewed back in November as a Summer 2012 release. Premier points to an April 2012 release, so check out the hints below and stick with Sneaker News for updates.